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Hubs - Velocity Fat Disc [1.54lbs] UPGRADE

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Hubs - Velocity Fat Disc [1.54lbs] UPGRADE

$150.00

Hubs - Velocity Fat Disc [1.54lbs] UPGRADE

$150.00

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Hubs - Velocity Fat Disc [1.54lbs] UPGRADE

$150.00

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Introducing the all-new Keystone Electric Fat Tire Bike. Since 2013, Borealis has specialized in lightweight, high end fat bikes. The Keystone is our first ever Class I electric bike. The frame geometry is optimized for riding just about anything with clearance for up to 5” wide tires. Paired with the most technically advanced components in the industry, the Keystone sets the standard for premium quality Electric fat bikes.

HIGHLIGHTS

Color: Gunmetal Grey with Cobalt Blue Graphics
Weight: 56 lbs. as shown.
Standard features include Shimano EP8 Drive Unit, Shimano 630Wh Battery, SRAM G2 RS brakes, Mastodon Pro EXT 120mm suspension fork, carbon handlebars, dropper seat post, durable Sun Ringle Mulefüt rims and your choice of tires.
Frame geometry provides responsive handling, offering maximum control for varying conditions in snow or sand.
Tire clearance up to 26x5” and 27.5x4.5”.
Lightweight, 6000 series aluminum frame comes with internally routed cables, 1-2 bottle cage mounts and lizard skin protection.
Keystone Frames are backed by our LIMITED LIFETIME WARRANTY.

ASSEMBLY

Some assembly required upon receipt. Your bike will be completely assembled and tuned by Borealis, then partially disassembled for shipment. The remaining assembly will require installation of the rear derailleur, chain, fork, seat post, wheels, and handlebars. A kit will be included with your order that has all the necessary tools assemble your bike, including a multi-tool, torque wrench, and shock pump. If you are not familiar with this level of assembly, we recommend having your local bike shop complete the assembly.

Stay tuned for our step-by-step assembly video.

WHEELS AND TIRES

All bikes come standard with tubes.

If you order rim tape with your Mulefut rims, we will tape the rims and install the tires with tubes.

Tubes must be removed and tubeless valves installed for tubeless set up. We recommended to have this completed by a professional bicycle mechanic.

SIZE CHART

BUILD SPECS

Frame	Borealis Keystone Aluminum 15", 17", 19", 21"
Drive Unit	Shimano DU-EP800
Battery	Shimano BT-E8036 (630Wh)
Display	Shimano SC-EM800
Assist Switch	Shimano SW-EM800L
Speed Sensor	Shimano EWSS300L540A
Fork	Manitou Mastodon PRO EXT 120mm, 51mm offset
Headset	FSA w/ Star Nut
Stem	Borealis 50mm
Handlebar	Borealis Carbon
Grips	Ergon GP1
Saddle	WTB Volt Medium Steel
Seat Collar	Borealis Bolt-On
Seatpost	KS Lev Integra 125mm (SM, MD) / 150mm (LG, XL)
Brakes	SRAM G2 RS
Rotors	SRAM HS2 200mm front / 180mm rear
Shifter	SRAM AXS Pod Contoller Right Bridge w/ MMX Clamp for GX Eagle Transmission
Derailleur	SRAM GX Eagle Transmission Derailleur
Cassette	SRAM GX Eagle Transmission Cassette 10-52T
Chain	SRAM GX Eagle Transmission Flattop Chain
Crank Arms	Samox 170mm
Chainring Mount	Samox 104 BCD for 75mm chainline
Chainring	SRAM Eagle Transmission E-Bike MTB Chainring 104 BCD 36T Steel
Rims	Your choice of SunRingle Mulefüt SL - 26x80, 27.5x80, or 27.5x65
Spokes	Straight Gauge 2.0 Black
Hubs	Borealis Gen 4 15x150 / 12x197
Tires	Your choice. All tire options are listed online.
Included	Shimano ECE80042 Battery Charger, AXS Power Pack, Kickstand, UDH Hanger, Key for battery release, Borealis Rear Thru Axle, Remote Battery Charging Adapter
Weight	Size Medium w/ Mulefut 27.5x80 & Terrene Yippee Ki Yay 4.3" Tires: 56 lbs.

FRAME SPECS

Wheel / Tire Size	26 x 3.8–5.0" on up to a 100mm rim / 27.5 x 2.8-4.5 on up to a 82mm rim / 29 x 2.25–3.0
Susp Fork Travel	120mm
Fork Offset	51mm
Headset-Upper	IS41
Headset-Lower	IS52
Seatpost	ø31.6mm
Seat Collar	ø34.9mm
Dropper Compatible	Internal - 125mm for SM & MD / 150mm for LG & XL
Front Derailleur Type	Not Compatible
Bottom Bracket	Shimano EP8
Crankset (Max Ring)	Chainline 75mm / 1x (38t)
Rear Brake (Rotor)	74mm post (160–180mm)
Rear Spacing	197 x 12mm thru-axle
Rear Axle	ø12 x 222L, TP= 1.0, TL = 16
Derailleur Hanger	SRAM UDH
Bottle Mount	Small & Medium: 1 (downtube) / Large & XL: 2 (downtube & seatube)
Rear Rack Reccomendation	Old Man Mountain Divide Fat
Rear Rack Mounts, Upper	Yes
Axle to Crown	531mm
Steerer Tube Size	28.6mm
Steerer Style	Tapered
Crown Seat Diameter	40mm

GEOMETRY CHART

	Small 15"	Medium 17"	Large 19"	X-Large 21"
Effective Top Tube	630	645	660	665
Seat Tube Center to Top	381	432	482	533
Head Tube Length	160	160	175	190
Head Tube Angle	69°	69°	69°	69°
Seat Tube Angle	73°	73°	73°	73°
Chainstay Length	480	480	480	480
BB Drop	60	60	60	60
Reach	420	435	445	446
Stack	688	688	702	716
Standover Height	varies based on wheel and tire size
Wheelbase	1187	1207	1223	1229
Fork Offset	51	51	51	51

FAQ:

Can I use the Keystone in cold temperatures?	It is okay to use your Keystone in the operating temperature range, suggest by Shimano: -10 - 50°C
How do I remove the battery?	Each Keystone will come with a set of keys. Make sure to save your spare key and safe location. Insert the key fully into the lock cylinder on the non drive side of the downtube until it stops. Rotate the key clockwise until the battery drops from the downtube providing access to the latch release mechanism. Use your index finger to gently depress the spring which will fully release the battery. Use caution to support the battery when removing it so it does not fall to the ground.
How can I file a warranty claim for the drive unit and other electronic components?	Contact an authorized Shimano STEPS dealer.
Can I change my motor/power settings?	Yes, you can customize your motor settings via the app as well as update the firmware. You'll need to download the Shimano E-tube mobile app.
Can I change the max speed?	No. Depending on where you've purchased your Keystone it will either have a max assist speed of 20mph or 25km/h. This setting cannot be modified by the user or a dealer.
Can I purchase an extra battery?	Yes, you can purchase a spare battery kit with a spare downtube cover directly from Borealis. Spare battery kits may not be available in all markets. You can also purchase a spare battery from Shimano, but it will not include a battery cover.
Can I ride the Keystone without the battery?	No. This will void your warranty with Shimano and cause damage to the motor system.
Do I need to update the firmware / software?	Firmware can be updated via the Shimano E-tube mobile app.
How do I use walk mode?	Hold the upper button (down assistance level) for 1 second until the display turns blue and displays WALK mode. Press and hold the same button to power the rear wheel.
How long does it take to charge the Shimano 630Wh Battery?	With the included EC-E8004 charger, the battery can fully charge in 6 hours.
How long will my battery last?	The remaining battery capacity is affected by temperature and cycle count. Generally, it decreases approximately 5% a year. This means roughly 95% capacity remains after 1 year, and 90% after 2 years.
How should I store my bike and or battery?	Charge your battery to approximately 70% before storing for long periods of time. Store in a cool, indoor location with a stable temperature between approximately 10 - 20 C / 50 - 70 F. No direct exposure to sunlight or rain.
Are the electronic components waterproof?	Yes, the STEPS system is waterproof as long as all components of the system, including the battery and battery cover, are installed correctly. We recommend not using a high-pressure washer to clean your Repeater, but riding in the rain and regular cleaning are okay.
My bike won't turn on, what do I do?	First, make sure all cables are plugged in, if they are then try removing and reinstalling the battery. If it still won't turn on try charging your bike for a few hours. If your bike is too hot or too cold, it might not turn on. If your bike still does not turn on, contact a Transition or Shimano dealer for support.
Should I only charge my battery when it's completely drained?	No, simply charge the battery any time you need it, frequent charges actually help battery longevity. Avoid letting the battery discharge completely. Charge to 70% before storing for long periods.
What are the different error codes and what do they mean?	Whenever you encounter an error code, first cycle the power off and then back on. If the code persists, remove the battery and then reinstall, which will hard reset the system. If neither of these steps resolves the issue, please reference the Shimano error code list. If you cannot resolve your error code via your Etube mobile app please visit your nearest Shimano STEPS dealer or contact Shimano STEPS customer support.
What is the range and how can I maximize it?	There are many factors that affect battery range, such as, how much effort the rider is providing, the gradient of terrain, ambient temperature, and rider weight. The best way to maximize your range it to spend more time in Eco and Trail modes, and minimize the amount of time spent in Boost mode.
What is the widest tire the Keystone can fit?	26x5.0" or 27.5x4.5"
What kind of maintenance is needed on the drive unit and how often?	The drive unit is sealed and cannot be serviced. If there are any issues with the drive unit, it will need to be removed and sent back to Shimano for service or replacement. The drive unit along with the battery is designed to last over 1000 charge cycles. Assuming you're getting 30 miles (48Km) per charge, the drive unit should last 30,000 miles, or much longer than pretty much any other part on your bike.
Why does my bike stop giving assistance over a certain speed?	Depending on where you've purchased your Keystone it will either have a max assist speed of 20mph or 25km/h. This setting cannot be modified by the user or a dealer.
Will environmental temperature affect battery life?	The battery life will be shorter during cold temperatures, this is not a sign of a problem.
Will my bike be delivered with a charged battery?	Your Keystone was shipped in a "sleep" mode with the battery at approximately 30% charge. It is recommended to fully charge your battery before the first ride.

$5,999.00

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Keystone - Electric Fat Bike⚡

Introducing the all-new Keystone Electric Fat Tire Bike. Since 2013, Borealis has specialized in lightweight, high end fat bikes. The Keystone is our first ever Class I electric bike. The frame geometry is optimized for riding just about anything with clearance for up to 5” wide tires. Paired with the most technically advanced components in the industry, the Keystone sets the standard for premium quality Electric fat bikes.

HIGHLIGHTS

Color: Gunmetal Grey with Cobalt Blue Graphics
Weight: 56 lbs. as shown.
Standard features include Shimano EP8 Drive Unit, Shimano 630Wh Battery, SRAM G2 RS brakes, Mastodon Pro EXT 120mm suspension fork, carbon handlebars, dropper seat post, durable Sun Ringle Mulefüt rims and your choice of tires.
Frame geometry provides responsive handling, offering maximum control for varying conditions in snow or sand.
Tire clearance up to 26x5” and 27.5x4.5”.
Lightweight, 6000 series aluminum frame comes with internally routed cables, 1-2 bottle cage mounts and lizard skin protection.
Keystone Frames are backed by our LIMITED LIFETIME WARRANTY.

ASSEMBLY

Some assembly required upon receipt. Your bike will be completely assembled and tuned by Borealis, then partially disassembled for shipment. The remaining assembly will require installation of the rear derailleur, chain, fork, seat post, wheels, and handlebars. A kit will be included with your order that has all the necessary tools assemble your bike, including a multi-tool, torque wrench, and shock pump. If you are not familiar with this level of assembly, we recommend having your local bike shop complete the assembly.

Stay tuned for our step-by-step assembly video.

WHEELS AND TIRES

All bikes come standard with tubes.

If you order rim tape with your Mulefut rims, we will tape the rims and install the tires with tubes.

Tubes must be removed and tubeless valves installed for tubeless set up. We recommended to have this completed by a professional bicycle mechanic.

SIZE CHART

BUILD SPECS

Frame	Borealis Keystone Aluminum 15", 17", 19", 21"
Drive Unit	Shimano DU-EP800
Battery	Shimano BT-E8036 (630Wh)
Display	Shimano SC-EM800
Assist Switch	Shimano SW-EM800L
Speed Sensor	Shimano EWSS300L540A
Fork	Manitou Mastodon PRO EXT 120mm, 51mm offset
Headset	FSA w/ Star Nut
Stem	Borealis 50mm
Handlebar	Borealis Carbon
Grips	Ergon GP1
Saddle	WTB Volt Medium Steel
Seat Collar	Borealis Bolt-On
Seatpost	KS Lev Integra 125mm (SM, MD) / 150mm (LG, XL)
Brakes	SRAM G2 RS
Rotors	SRAM HS2 200mm front / 180mm rear
Shifter	SRAM AXS Pod Contoller Right Bridge w/ MMX Clamp for GX Eagle Transmission
Derailleur	SRAM GX Eagle Transmission Derailleur
Cassette	SRAM GX Eagle Transmission Cassette 10-52T
Chain	SRAM GX Eagle Transmission Flattop Chain
Crank Arms	Samox 170mm
Chainring Mount	Samox 104 BCD for 75mm chainline
Chainring	SRAM Eagle Transmission E-Bike MTB Chainring 104 BCD 36T Steel
Rims	Your choice of SunRingle Mulefüt SL - 26x80, 27.5x80, or 27.5x65
Spokes	Straight Gauge 2.0 Black
Hubs	Borealis Gen 4 15x150 / 12x197
Tires	Your choice. All tire options are listed online.
Included	Shimano ECE80042 Battery Charger, AXS Power Pack, Kickstand, UDH Hanger, Key for battery release, Borealis Rear Thru Axle, Remote Battery Charging Adapter
Weight	Size Medium w/ Mulefut 27.5x80 & Terrene Yippee Ki Yay 4.3" Tires: 56 lbs.

FRAME SPECS

Wheel / Tire Size	26 x 3.8–5.0" on up to a 100mm rim / 27.5 x 2.8-4.5 on up to a 82mm rim / 29 x 2.25–3.0
Susp Fork Travel	120mm
Fork Offset	51mm
Headset-Upper	IS41
Headset-Lower	IS52
Seatpost	ø31.6mm
Seat Collar	ø34.9mm
Dropper Compatible	Internal - 125mm for SM & MD / 150mm for LG & XL
Front Derailleur Type	Not Compatible
Bottom Bracket	Shimano EP8
Crankset (Max Ring)	Chainline 75mm / 1x (38t)
Rear Brake (Rotor)	74mm post (160–180mm)
Rear Spacing	197 x 12mm thru-axle
Rear Axle	ø12 x 222L, TP= 1.0, TL = 16
Derailleur Hanger	SRAM UDH
Bottle Mount	Small & Medium: 1 (downtube) / Large & XL: 2 (downtube & seatube)
Rear Rack Reccomendation	Old Man Mountain Divide Fat
Rear Rack Mounts, Upper	Yes
Axle to Crown	531mm
Steerer Tube Size	28.6mm
Steerer Style	Tapered
Crown Seat Diameter	40mm

GEOMETRY CHART

	Small 15"	Medium 17"	Large 19"	X-Large 21"
Effective Top Tube	630	645	660	665
Seat Tube Center to Top	381	432	482	533
Head Tube Length	160	160	175	190
Head Tube Angle	69°	69°	69°	69°
Seat Tube Angle	73°	73°	73°	73°
Chainstay Length	480	480	480	480
BB Drop	60	60	60	60
Reach	420	435	445	446
Stack	688	688	702	716
Standover Height	varies based on wheel and tire size
Wheelbase	1187	1207	1223	1229
Fork Offset	51	51	51	51

FAQ:

Can I use the Keystone in cold temperatures?	It is okay to use your Keystone in the operating temperature range, suggest by Shimano: -10 - 50°C
How do I remove the battery?	Each Keystone will come with a set of keys. Make sure to save your spare key and safe location. Insert the key fully into the lock cylinder on the non drive side of the downtube until it stops. Rotate the key clockwise until the battery drops from the downtube providing access to the latch release mechanism. Use your index finger to gently depress the spring which will fully release the battery. Use caution to support the battery when removing it so it does not fall to the ground.
How can I file a warranty claim for the drive unit and other electronic components?	Contact an authorized Shimano STEPS dealer.
Can I change my motor/power settings?	Yes, you can customize your motor settings via the app as well as update the firmware. You'll need to download the Shimano E-tube mobile app.
Can I change the max speed?	No. Depending on where you've purchased your Keystone it will either have a max assist speed of 20mph or 25km/h. This setting cannot be modified by the user or a dealer.
Can I purchase an extra battery?	Yes, you can purchase a spare battery kit with a spare downtube cover directly from Borealis. Spare battery kits may not be available in all markets. You can also purchase a spare battery from Shimano, but it will not include a battery cover.
Can I ride the Keystone without the battery?	No. This will void your warranty with Shimano and cause damage to the motor system.
Do I need to update the firmware / software?	Firmware can be updated via the Shimano E-tube mobile app.
How do I use walk mode?	Hold the upper button (down assistance level) for 1 second until the display turns blue and displays WALK mode. Press and hold the same button to power the rear wheel.
How long does it take to charge the Shimano 630Wh Battery?	With the included EC-E8004 charger, the battery can fully charge in 6 hours.
How long will my battery last?	The remaining battery capacity is affected by temperature and cycle count. Generally, it decreases approximately 5% a year. This means roughly 95% capacity remains after 1 year, and 90% after 2 years.
How should I store my bike and or battery?	Charge your battery to approximately 70% before storing for long periods of time. Store in a cool, indoor location with a stable temperature between approximately 10 - 20 C / 50 - 70 F. No direct exposure to sunlight or rain.
Are the electronic components waterproof?	Yes, the STEPS system is waterproof as long as all components of the system, including the battery and battery cover, are installed correctly. We recommend not using a high-pressure washer to clean your Repeater, but riding in the rain and regular cleaning are okay.
My bike won't turn on, what do I do?	First, make sure all cables are plugged in, if they are then try removing and reinstalling the battery. If it still won't turn on try charging your bike for a few hours. If your bike is too hot or too cold, it might not turn on. If your bike still does not turn on, contact a Transition or Shimano dealer for support.
Should I only charge my battery when it's completely drained?	No, simply charge the battery any time you need it, frequent charges actually help battery longevity. Avoid letting the battery discharge completely. Charge to 70% before storing for long periods.
What are the different error codes and what do they mean?	Whenever you encounter an error code, first cycle the power off and then back on. If the code persists, remove the battery and then reinstall, which will hard reset the system. If neither of these steps resolves the issue, please reference the Shimano error code list. If you cannot resolve your error code via your Etube mobile app please visit your nearest Shimano STEPS dealer or contact Shimano STEPS customer support.
What is the range and how can I maximize it?	There are many factors that affect battery range, such as, how much effort the rider is providing, the gradient of terrain, ambient temperature, and rider weight. The best way to maximize your range it to spend more time in Eco and Trail modes, and minimize the amount of time spent in Boost mode.
What is the widest tire the Keystone can fit?	26x5.0" or 27.5x4.5"
What kind of maintenance is needed on the drive unit and how often?	The drive unit is sealed and cannot be serviced. If there are any issues with the drive unit, it will need to be removed and sent back to Shimano for service or replacement. The drive unit along with the battery is designed to last over 1000 charge cycles. Assuming you're getting 30 miles (48Km) per charge, the drive unit should last 30,000 miles, or much longer than pretty much any other part on your bike.
Why does my bike stop giving assistance over a certain speed?	Depending on where you've purchased your Keystone it will either have a max assist speed of 20mph or 25km/h. This setting cannot be modified by the user or a dealer.
Will environmental temperature affect battery life?	The battery life will be shorter during cold temperatures, this is not a sign of a problem.
Will my bike be delivered with a charged battery?	Your Keystone was shipped in a "sleep" mode with the battery at approximately 30% charge. It is recommended to fully charge your battery before the first ride.

$5,999.00

Quick View

Compare

Quick View

Compare

Keystone Electric Fat Bike⚡

$5,999.00

Keystone Electric Fat Bike⚡

Introducing the all-new Keystone Electric Fat Tire Bike. Since 2013, Borealis has specialized in lightweight, high end fat bikes. The Keystone is our first ever Class I electric bike. The frame geometry is optimized for riding just about anything with clearance for up to 5” wide tires. Paired with the most technically advanced components in the industry, the Keystone sets the standard for premium quality Electric fat bikes.

HIGHLIGHTS

Color: Red & Black with Silver Graphics
Weight: 56 lbs. as shown.
Standard features include Shimano EP8 Drive Unit, Shimano 630Wh Battery, SRAM Eagle GX T-Type Transmission, SRAM G2 RS brakes, Manitou Mastodon Pro EXT 120mm suspension fork, carbon handlebars, dropper seat post, durable Sun Ringle Mulefüt rims and Terrene Cake Eater 4" tires.
Frame geometry provides responsive handling, offering maximum control for varying conditions in snow or sand.
Tire clearance up to 26x5” and 27.5x4.5”.
Lightweight, 6000 series aluminum frame comes with internally routed cables, 1-2 bottle cage mounts and lizard skin protection.
Keystone Frames are backed by our LIMITED LIFETIME WARRANTY.

ASSEMBLY

Some assembly required upon receipt. Your bike will be completely assembled and tuned by Borealis, then partially disassembled for shipment. The remaining assembly will require installation of the rear derailleur, chain, fork, seat post, wheels, and handlebars. If you are not familiar with this level of assembly, we recommend having your local bike shop complete the assembly. See assembly video in media.

WHEELS AND TIRES

All bikes come standard with tubes.

SIZE CHART

BUILD SPECS

Frame	Borealis Keystone Aluminum 15", 17", 19", 21"
Drive Unit	Shimano DU-EP800
Battery	Shimano BT-E8036 (630Wh)
Display	Shimano SC-EM800
Assist Switch	Shimano SW-EM800L
Speed Sensor	Shimano EWSS300L540A
Fork	Manitou Mastodon PRO EXT 120mm, 51mm offset
Headset	FSA w/ Star Nut
Stem	Borealis 50mm
Handlebar	Borealis Carbon
Grips	Ergon GP1
Saddle	WTB Volt Medium Steel
Seat Collar	Borealis Bolt-On
Seatpost	KS Lev Integra 125mm (SM, MD) / 150mm (LG, XL)
Brakes	SRAM G2 RS
Rotors	SRAM HS2 200mm front / 180mm rear
Shifter	SRAM AXS Pod Contoller Right Bridge w/ MMX Clamp for GX Eagle Transmission
Derailleur	SRAM GX Eagle Transmission Derailleur
Cassette	SRAM GX Eagle Transmission Cassette 10-52T
Chain	SRAM GX Eagle Transmission Flattop Chain
Crank Arms	Samox 170mm
Chainring Mount	Samox 104 BCD for 75mm chainline
Chainring	SRAM Eagle Transmission E-Bike MTB Chainring 104 BCD 36T Steel
Rims	SunRingle Mulefüt SL 27.5x65
Spokes	Straight Gauge 2.0 Black
Hubs	Borealis Gen 4 15x150 / 12x197
Tires	Terrene Cake Eater 27.5x4.0" Light 120TPI
Included	Shimano ECE80042 Battery Charger, AXS Power Pack, Kickstand, UDH Hanger, Key for battery release, Borealis Rear Thru Axle, Remote Battery Charging Adapter
Weight	Size Medium w/ Mulefut 27.5x80 & Terrene Yippee Ki Yay 4.3" Tires: 56 lbs.

FRAME SPECS

Wheel / Tire Size	26 x 3.8–5.0" on up to a 100mm rim / 27.5 x 2.8-4.5 on up to a 82mm rim / 29 x 2.25–3.0
Susp Fork Travel	120mm
Fork Offset	51mm
Headset-Upper	IS41
Headset-Lower	IS52
Seatpost	ø31.6mm
Seat Collar	ø34.9mm
Dropper Compatible	Internal - 125mm for SM & MD / 150mm for LG & XL
Front Derailleur Type	Not Compatible
Bottom Bracket	Shimano EP8
Crankset (Max Ring)	Chainline 75mm / 1x (38t)
Rear Brake (Rotor)	74mm post (160–180mm)
Rear Spacing	197 x 12mm thru-axle
Rear Axle	ø12 x 222L, TP= 1.0, TL = 16
Derailleur Hanger	SRAM UDH
Bottle Mount	Small & Medium: 1 (downtube) / Large & XL: 2 (downtube & seatube)
Rear Rack Reccomendation	Old Man Mountain Divide Fat
Rear Rack Mounts, Upper	Yes
Axle to Crown	531mm
Steerer Tube Size	28.6mm
Steerer Style	Tapered
Crown Seat Diameter	40mm

GEOMETRY CHART

	Small 15"	Medium 17"	Large 19"	X-Large 21"
Effective Top Tube	630	645	660	665
Seat Tube Center to Top	381	432	482	533
Head Tube Length	160	160	175	190
Head Tube Angle	69°	69°	69°	69°
Seat Tube Angle	73°	73°	73°	73°
Chainstay Length	480	480	480	480
BB Drop	60	60	60	60
Reach	420	435	445	446
Stack	688	688	702	716
Standover Height	varies based on wheel and tire size
Wheelbase	1187	1207	1223	1229
Fork Offset	51	51	51	51

FAQ:

Can I use the Keystone in cold temperatures?	It is okay to use your Keystone in the operating temperature range, suggest by Shimano: -10 - 50°C
How do I remove the battery?	Each Keystone will come with a set of keys. Make sure to save your spare key and safe location. Insert the key fully into the lock cylinder on the non drive side of the downtube until it stops. Rotate the key clockwise until the battery drops from the downtube providing access to the latch release mechanism. Use your index finger to gently depress the spring which will fully release the battery. Use caution to support the battery when removing it so it does not fall to the ground.
How can I file a warranty claim for the drive unit and other electronic components?	Contact an authorized Shimano STEPS dealer.
Can I change my motor/power settings?	Yes, you can customize your motor settings via the app as well as update the firmware. You'll need to download the Shimano E-tube mobile app.
Can I change the max speed?	No. Depending on where you've purchased your Keystone it will either have a max assist speed of 20mph or 25km/h. This setting cannot be modified by the user or a dealer.
Can I purchase an extra battery?	Yes, you can purchase a spare battery kit with a spare downtube cover directly from Borealis. Spare battery kits may not be available in all markets. You can also purchase a spare battery from Shimano, but it will not include a battery cover.
Can I ride the Keystone without the battery?	No. This will void your warranty with Shimano and cause damage to the motor system.
Do I need to update the firmware / software?	Firmware can be updated via the Shimano E-tube mobile app.
How do I use walk mode?	Hold the upper button (down assistance level) for 1 second until the display turns blue and displays WALK mode. Press and hold the same button to power the rear wheel.
How long does it take to charge the Shimano 630Wh Battery?	With the included EC-E8004 charger, the battery can fully charge in 6 hours.
How long will my battery last?	The remaining battery capacity is affected by temperature and cycle count. Generally, it decreases approximately 5% a year. This means roughly 95% capacity remains after 1 year, and 90% after 2 years.
How should I store my bike and or battery?	Charge your battery to approximately 70% before storing for long periods of time. Store in a cool, indoor location with a stable temperature between approximately 10 - 20 C / 50 - 70 F. No direct exposure to sunlight or rain.
Are the electronic components waterproof?	Yes, the STEPS system is waterproof as long as all components of the system, including the battery and battery cover, are installed correctly. We recommend not using a high-pressure washer to clean your Repeater, but riding in the rain and regular cleaning are okay.
My bike won't turn on, what do I do?	First, make sure all cables are plugged in, if they are then try removing and reinstalling the battery. If it still won't turn on try charging your bike for a few hours. If your bike is too hot or too cold, it might not turn on. If your bike still does not turn on, contact a Transition or Shimano dealer for support.
Should I only charge my battery when it's completely drained?	No, simply charge the battery any time you need it, frequent charges actually help battery longevity. Avoid letting the battery discharge completely. Charge to 70% before storing for long periods.
What are the different error codes and what do they mean?	Whenever you encounter an error code, first cycle the power off and then back on. If the code persists, remove the battery and then reinstall, which will hard reset the system. If neither of these steps resolves the issue, please reference the Shimano error code list. If you cannot resolve your error code via your Etube mobile app please visit your nearest Shimano STEPS dealer or contact Shimano STEPS customer support.
What is the range and how can I maximize it?	There are many factors that affect battery range, such as, how much effort the rider is providing, the gradient of terrain, ambient temperature, and rider weight. The best way to maximize your range it to spend more time in Eco and Trail modes, and minimize the amount of time spent in Boost mode.
What is the widest tire the Keystone can fit?	26x5.0" or 27.5x4.5"
What kind of maintenance is needed on the drive unit and how often?	The drive unit is sealed and cannot be serviced. If there are any issues with the drive unit, it will need to be removed and sent back to Shimano for service or replacement. The drive unit along with the battery is designed to last over 1000 charge cycles. Assuming you're getting 30 miles (48Km) per charge, the drive unit should last 30,000 miles, or much longer than pretty much any other part on your bike.
Why does my bike stop giving assistance over a certain speed?	Depending on where you've purchased your Keystone it will either have a max assist speed of 20mph or 25km/h. This setting cannot be modified by the user or a dealer.
Will environmental temperature affect battery life?	The battery life will be shorter during cold temperatures, this is not a sign of a problem.
Will my bike be delivered with a charged battery?	Your Keystone was shipped in a "sleep" mode with the battery at approximately 30% charge. It is recommended to fully charge your battery before the first ride.

$5,999.00

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Keystone Electric Fat Bike⚡

Introducing the all-new Keystone Electric Fat Tire Bike. Since 2013, Borealis has specialized in lightweight, high end fat bikes. The Keystone is our first ever Class I electric bike. The frame geometry is optimized for riding just about anything with clearance for up to 5” wide tires. Paired with the most technically advanced components in the industry, the Keystone sets the standard for premium quality Electric fat bikes.

HIGHLIGHTS

Color: Red & Black with Silver Graphics
Weight: 56 lbs. as shown.
Standard features include Shimano EP8 Drive Unit, Shimano 630Wh Battery, SRAM Eagle GX T-Type Transmission, SRAM G2 RS brakes, Manitou Mastodon Pro EXT 120mm suspension fork, carbon handlebars, dropper seat post, durable Sun Ringle Mulefüt rims and Terrene Cake Eater 4" tires.
Frame geometry provides responsive handling, offering maximum control for varying conditions in snow or sand.
Tire clearance up to 26x5” and 27.5x4.5”.
Lightweight, 6000 series aluminum frame comes with internally routed cables, 1-2 bottle cage mounts and lizard skin protection.
Keystone Frames are backed by our LIMITED LIFETIME WARRANTY.

ASSEMBLY

Some assembly required upon receipt. Your bike will be completely assembled and tuned by Borealis, then partially disassembled for shipment. The remaining assembly will require installation of the rear derailleur, chain, fork, seat post, wheels, and handlebars. If you are not familiar with this level of assembly, we recommend having your local bike shop complete the assembly. See assembly video in media.

WHEELS AND TIRES

All bikes come standard with tubes.

SIZE CHART

BUILD SPECS

Frame	Borealis Keystone Aluminum 15", 17", 19", 21"
Drive Unit	Shimano DU-EP800
Battery	Shimano BT-E8036 (630Wh)
Display	Shimano SC-EM800
Assist Switch	Shimano SW-EM800L
Speed Sensor	Shimano EWSS300L540A
Fork	Manitou Mastodon PRO EXT 120mm, 51mm offset
Headset	FSA w/ Star Nut
Stem	Borealis 50mm
Handlebar	Borealis Carbon
Grips	Ergon GP1
Saddle	WTB Volt Medium Steel
Seat Collar	Borealis Bolt-On
Seatpost	KS Lev Integra 125mm (SM, MD) / 150mm (LG, XL)
Brakes	SRAM G2 RS
Rotors	SRAM HS2 200mm front / 180mm rear
Shifter	SRAM AXS Pod Contoller Right Bridge w/ MMX Clamp for GX Eagle Transmission
Derailleur	SRAM GX Eagle Transmission Derailleur
Cassette	SRAM GX Eagle Transmission Cassette 10-52T
Chain	SRAM GX Eagle Transmission Flattop Chain
Crank Arms	Samox 170mm
Chainring Mount	Samox 104 BCD for 75mm chainline
Chainring	SRAM Eagle Transmission E-Bike MTB Chainring 104 BCD 36T Steel
Rims	SunRingle Mulefüt SL 27.5x65
Spokes	Straight Gauge 2.0 Black
Hubs	Borealis Gen 4 15x150 / 12x197
Tires	Terrene Cake Eater 27.5x4.0" Light 120TPI
Included	Shimano ECE80042 Battery Charger, AXS Power Pack, Kickstand, UDH Hanger, Key for battery release, Borealis Rear Thru Axle, Remote Battery Charging Adapter
Weight	Size Medium w/ Mulefut 27.5x80 & Terrene Yippee Ki Yay 4.3" Tires: 56 lbs.

FRAME SPECS

Wheel / Tire Size	26 x 3.8–5.0" on up to a 100mm rim / 27.5 x 2.8-4.5 on up to a 82mm rim / 29 x 2.25–3.0
Susp Fork Travel	120mm
Fork Offset	51mm
Headset-Upper	IS41
Headset-Lower	IS52
Seatpost	ø31.6mm
Seat Collar	ø34.9mm
Dropper Compatible	Internal - 125mm for SM & MD / 150mm for LG & XL
Front Derailleur Type	Not Compatible
Bottom Bracket	Shimano EP8
Crankset (Max Ring)	Chainline 75mm / 1x (38t)
Rear Brake (Rotor)	74mm post (160–180mm)
Rear Spacing	197 x 12mm thru-axle
Rear Axle	ø12 x 222L, TP= 1.0, TL = 16
Derailleur Hanger	SRAM UDH
Bottle Mount	Small & Medium: 1 (downtube) / Large & XL: 2 (downtube & seatube)
Rear Rack Reccomendation	Old Man Mountain Divide Fat
Rear Rack Mounts, Upper	Yes
Axle to Crown	531mm
Steerer Tube Size	28.6mm
Steerer Style	Tapered
Crown Seat Diameter	40mm

GEOMETRY CHART

	Small 15"	Medium 17"	Large 19"	X-Large 21"
Effective Top Tube	630	645	660	665
Seat Tube Center to Top	381	432	482	533
Head Tube Length	160	160	175	190
Head Tube Angle	69°	69°	69°	69°
Seat Tube Angle	73°	73°	73°	73°
Chainstay Length	480	480	480	480
BB Drop	60	60	60	60
Reach	420	435	445	446
Stack	688	688	702	716
Standover Height	varies based on wheel and tire size
Wheelbase	1187	1207	1223	1229
Fork Offset	51	51	51	51

FAQ:

Can I use the Keystone in cold temperatures?	It is okay to use your Keystone in the operating temperature range, suggest by Shimano: -10 - 50°C
How do I remove the battery?	Each Keystone will come with a set of keys. Make sure to save your spare key and safe location. Insert the key fully into the lock cylinder on the non drive side of the downtube until it stops. Rotate the key clockwise until the battery drops from the downtube providing access to the latch release mechanism. Use your index finger to gently depress the spring which will fully release the battery. Use caution to support the battery when removing it so it does not fall to the ground.
How can I file a warranty claim for the drive unit and other electronic components?	Contact an authorized Shimano STEPS dealer.
Can I change my motor/power settings?	Yes, you can customize your motor settings via the app as well as update the firmware. You'll need to download the Shimano E-tube mobile app.
Can I change the max speed?	No. Depending on where you've purchased your Keystone it will either have a max assist speed of 20mph or 25km/h. This setting cannot be modified by the user or a dealer.
Can I purchase an extra battery?	Yes, you can purchase a spare battery kit with a spare downtube cover directly from Borealis. Spare battery kits may not be available in all markets. You can also purchase a spare battery from Shimano, but it will not include a battery cover.
Can I ride the Keystone without the battery?	No. This will void your warranty with Shimano and cause damage to the motor system.
Do I need to update the firmware / software?	Firmware can be updated via the Shimano E-tube mobile app.
How do I use walk mode?	Hold the upper button (down assistance level) for 1 second until the display turns blue and displays WALK mode. Press and hold the same button to power the rear wheel.
How long does it take to charge the Shimano 630Wh Battery?	With the included EC-E8004 charger, the battery can fully charge in 6 hours.
How long will my battery last?	The remaining battery capacity is affected by temperature and cycle count. Generally, it decreases approximately 5% a year. This means roughly 95% capacity remains after 1 year, and 90% after 2 years.
How should I store my bike and or battery?	Charge your battery to approximately 70% before storing for long periods of time. Store in a cool, indoor location with a stable temperature between approximately 10 - 20 C / 50 - 70 F. No direct exposure to sunlight or rain.
Are the electronic components waterproof?	Yes, the STEPS system is waterproof as long as all components of the system, including the battery and battery cover, are installed correctly. We recommend not using a high-pressure washer to clean your Repeater, but riding in the rain and regular cleaning are okay.
My bike won't turn on, what do I do?	First, make sure all cables are plugged in, if they are then try removing and reinstalling the battery. If it still won't turn on try charging your bike for a few hours. If your bike is too hot or too cold, it might not turn on. If your bike still does not turn on, contact a Transition or Shimano dealer for support.
Should I only charge my battery when it's completely drained?	No, simply charge the battery any time you need it, frequent charges actually help battery longevity. Avoid letting the battery discharge completely. Charge to 70% before storing for long periods.
What are the different error codes and what do they mean?	Whenever you encounter an error code, first cycle the power off and then back on. If the code persists, remove the battery and then reinstall, which will hard reset the system. If neither of these steps resolves the issue, please reference the Shimano error code list. If you cannot resolve your error code via your Etube mobile app please visit your nearest Shimano STEPS dealer or contact Shimano STEPS customer support.
What is the range and how can I maximize it?	There are many factors that affect battery range, such as, how much effort the rider is providing, the gradient of terrain, ambient temperature, and rider weight. The best way to maximize your range it to spend more time in Eco and Trail modes, and minimize the amount of time spent in Boost mode.
What is the widest tire the Keystone can fit?	26x5.0" or 27.5x4.5"
What kind of maintenance is needed on the drive unit and how often?	The drive unit is sealed and cannot be serviced. If there are any issues with the drive unit, it will need to be removed and sent back to Shimano for service or replacement. The drive unit along with the battery is designed to last over 1000 charge cycles. Assuming you're getting 30 miles (48Km) per charge, the drive unit should last 30,000 miles, or much longer than pretty much any other part on your bike.
Why does my bike stop giving assistance over a certain speed?	Depending on where you've purchased your Keystone it will either have a max assist speed of 20mph or 25km/h. This setting cannot be modified by the user or a dealer.
Will environmental temperature affect battery life?	The battery life will be shorter during cold temperatures, this is not a sign of a problem.
Will my bike be delivered with a charged battery?	Your Keystone was shipped in a "sleep" mode with the battery at approximately 30% charge. It is recommended to fully charge your battery before the first ride.