$2,099.00
Crestone Custom - Carbon Fat Bike
SPRING CLEANING SALE - 25% Off Full Price Bikes DISCOUNT APPLIED IN CART. Sale Ends 5/31!
0% APR up to 24 months with Affirm! Financing Options Available at Checkout.
Size Chart
Size Chart
Shipping and Returns
Shipping and Returns
Borealis does not accept shipments to PO boxes, and additional charges may apply for deliveries to Alaska and Hawaii. We offer flat rate shipping on all products through the most economical FedEx option.
Bikes, frames, and wheelsets typically ship via Ground, while small parts are shipped using 2-Day Express. Please contact us if any damage occurs during shipping.
Borealis provides a 30-day money-back guarantee. If you're not satisfied with your purchase, you can exchange the product or return it for a full refund, minus any transaction fees and shipping costs. Return shipping is the customer’s responsibility, and all returned or exchanged items must be in sellable condition.
LIMITED LIFETIME WARRANTY
LIMITED LIFETIME WARRANTY
LIMITED LIFETIME WARRANTY ON BICYCLE FRAMES & FORKS
FOR PURCHASES MADE ON OR AFTER JANUARY 1, 2023:
Original Owner
BOREALIS offers a LIMITED LIFETIME warranty to the original owner of each new BOREALIS bicycle, fork or frameset that the bicycle frame, fork or frameset when new is free of defective materials and workmanship.
Normal Conditions
The limited warranty is conditioned upon the bicycle being operated under normal conditions and use, and properly maintained.
Limitations
This limited warranty does not apply to paint/finish or components attached to the bicycle/fork/frameset such as rims, drive train, brakes, seat post, handlebar and stem, or any suspension related parts or components.
Paint/finish, components attached to the bicycle/frameset such as rims, drive train, brakes, seat post, handlebar and stem, or any suspension-related parts or components are covered under the limited one (1) year warranty.
Load Weight
The total cargo load for BOREALIS frames and forks is 300 pounds. The total cargo load includes the rider and any associated gear warn by the rider or attached to the frame or fork.
PURCHASES MADE BEFORE JANUARY 1, 2023 HAVE A 5-YEAR WARRANTY WITH THE SAME LIMITATIONS.
LIMITED ONE (1) YEAR WARRANTY ON COMPLETE BICYCLE
Subject to the following limitations, terms and conditions, BOREALIS warrants to the original owner of each new BOREALIS bicycle that this bicycle, when new, is free of defective materials and workmanship. This warranty shall expire one (1) year from the date of the original purchase from an authorized BOREALIS dealer and is conditioned upon the bicycle being operated under normal conditions and use, and properly maintained. This warranty is void if the bicycle was not purchased new or not properly assembled by an authorized BOREALIS dealer.
Click for Full Details Here
FOR PURCHASES MADE ON OR AFTER JANUARY 1, 2023:
Original Owner
BOREALIS offers a LIMITED LIFETIME warranty to the original owner of each new BOREALIS bicycle, fork or frameset that the bicycle frame, fork or frameset when new is free of defective materials and workmanship.
Normal Conditions
The limited warranty is conditioned upon the bicycle being operated under normal conditions and use, and properly maintained.
Limitations
This limited warranty does not apply to paint/finish or components attached to the bicycle/fork/frameset such as rims, drive train, brakes, seat post, handlebar and stem, or any suspension related parts or components.
Paint/finish, components attached to the bicycle/frameset such as rims, drive train, brakes, seat post, handlebar and stem, or any suspension-related parts or components are covered under the limited one (1) year warranty.
Load Weight
The total cargo load for BOREALIS frames and forks is 300 pounds. The total cargo load includes the rider and any associated gear warn by the rider or attached to the frame or fork.
PURCHASES MADE BEFORE JANUARY 1, 2023 HAVE A 5-YEAR WARRANTY WITH THE SAME LIMITATIONS.
LIMITED ONE (1) YEAR WARRANTY ON COMPLETE BICYCLE
Subject to the following limitations, terms and conditions, BOREALIS warrants to the original owner of each new BOREALIS bicycle that this bicycle, when new, is free of defective materials and workmanship. This warranty shall expire one (1) year from the date of the original purchase from an authorized BOREALIS dealer and is conditioned upon the bicycle being operated under normal conditions and use, and properly maintained. This warranty is void if the bicycle was not purchased new or not properly assembled by an authorized BOREALIS dealer.
Click for Full Details Here
Couldn't load pickup availability
The Crestone is our tried and true flagship model. The frame geometry is optimized for riding in snow and sand with clearance for up to 5” wide tires. Paired with the most technically advanced components in the industry, the Crestone sets the standard for premium quality carbon fiber fat bikes.
HIGHLIGHTS
- Standard features include: SRAM Eagle NX 12-Speed drivetrain, SRAM Level T brakes, rigid carbon fork, carbon handlebars, carbon 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”.
- Compatibility for 100-120mm of suspension travel for more technical riding.
- Lightweight, durable carbon fiber frame comes with internally routed cables, 2-3 bottle cage mounts and lizard skin protectors on both the down tube and drive-side chain stay.
WHEELS & 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.
- HED Alloy and HED Carbon rims do not require rim tape for tubeless set up.
- Tubes must be removed and tubeless valves installed for tubeless set up. We recommended to have this completed by a professional bicycle mechanic.
BUILD SPECS
| Frame | Flume (Aluminum) | |||
| Fork | Borealis Carbon Rigid Fork Standard Option | |||
| Bottom Bracket | SRAM DUB 100mm | |||
| Crankset | SRAM Eagle NX Alloy 175mm w/ SRAM X-SYNC 30T | SRAM Eagle GX Alloy 175mm w/ SRAM X-SYNC 30T | SRAM Eagle X0 Carbon 175mm w/ SRAM X-SYNC 30T | SRAM Eagle XX Carbon 175mm w/ SRAM X-SYNC 30T |
| Rear Derailleur | SRAM Eagle NX 12 Speed | SRAM Eagle GX 12 Speed | SRAM Eagle X0 12 Speed | SRAM Eagle XX 12 Speed |
| Chain | Eagle GX | Eagle GX | Eagle GX | Eagle XX Gold |
| Cassette | PG 1230 11-50 | XG 1275 10-52 | XG 1295 10-52 | XG 1299 10-52 Gold |
| Shifter | SRAM Eagle NX | SRAM Eagle GX | SRAM Eagle GX | SRAM Eagle GX |
| Brakes | SRAM Level T 2-piston OR SRAM G2 RS 4-Piston Hydraulic | |||
| Rotors | SRAM Centerline 160mm | |||
| Headset | FSA | |||
| Hubs | Borealis GEN 4 Black 15x150 Front / 12x197 Rear | |||
| Rims | Sun Ringle Mulefut V2 26x80 or 27.5x65 | |||
| Spokes | Borealis Straight Gauge | |||
| Nipples | Borealis Silver Brass | |||
| Tires | Your Choice | |||
| Bar | Borealis Carbon 35x760mm | |||
| Stem | Borealis 50mm | |||
| Post | Borealis Carbon 31.6x400mm | |||
| Saddle | Borealis | |||
| Grips | Ergon GP10 | |||
| DT/CS Protector | Lizard Skins | |||
| Weight | See weight calculator for estimated weight. | |||
GEOMETRY CHART
Stack and Reach are the fundamental fit elements, they are both measured relative to the bottom bracket. When choosing the Borealis that is right for you, it’s important to find a balance in these measurements to ensure the best performance.
| S | M | L | XL | |
| EFFECTIVE TOP TUBE | 585 mm | 610 mm | 630 mm | 650 mm |
| SEAT TUBE CENTER TO TOP | 381 mm | 432 mm | 484 mm | 534 mm |
| HEAD TUBE | 105 mm | 120 mm | 135 mm | 150 mm |
| SEAT TUBE ANGLE | 73 deg | 73 deg | 73 deg | 73 deg |
| HEAD TUBE ANGLE | 70 deg | 70 deg | 70 deg | 70 deg |
| STANDOVER HEIGHT | Varies based on wheel and tire size | |||
| CHAINSTAY | 459 mm | 459 mm | 459 mm | 459 mm |
| BB DROP | 60 mm | 60 mm | 60 mm | 60 mm |
| REACH | 407 mm | 423 mm | 438 mm | 451 mm |
| STACK | 597 mm | 611 mm | 625 mm | 639 mm |
ASSEMBLY
There is 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 multi-tool will be included with your order that has all tools necessary to assemble the bike, with the exception of a torque wrench. If you are not familiar with this level of assembly, we recommend having your local bike shop complete the assembly. Below is a video showing the remaining assembly once you receive the bike. Tires will be set up with tubes. Tubeless rim tape and valves are included on the side.
OWNER'S MANUAL
COMPATIBILITY
- Rockshox Bluto Fork tire size limitations: 26x5” or 27.5x4”
- Mastodon Pro EXT Fork tire size limitations: 26x5” or 27.5x4.5”
- Borealis Rigid Carbon Fork tire size limitations: 26x5” or 27.5x4.5”
- Dually 29x45 and 27.5x45 Rims – Max tire width: 3”
- All rims 65mm to 85mm wide are compatible with tire widths of 3.8” to 5”
- HED Carbon 100mm Rims – Max tire width of 4.6”
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★ Reviews
86%
(102)
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The Keystone is my first e-bike having been a fat tire mtb enthusiast this was a no brainer, it is the most fun I’ve had on a fat tire bike. Love it !! thanks Borealis.
What a great bike, love how light weight it is and soooo smooth!
Bought this xl frame to replace my 5 year old crestone. There was nothing wrong with my old one (had 13,000 + miles on it) but the blowout price on the xl was so good i had to buy it. paint is incredible.
This is my third eFat and although I liked other two - the Keystone is just beyond. I set mine up with a Redshift ShockStop seatpost (hardtail with benefits!), Ergotec 45 degree by 50 stem, carbon riser bar, and Schwalbe Al Mighty 4.8 tires (328 Billy Flamingo studs per baby!) The T-type drivetrain blew me away so much I converted my other bikes.
I also received unbelievable service from the Borealis sales rep during purchase.
Simply heaven!
Customer Reviews
Love my new FatBike , ordered online with the help of a sales rep, built my own and got some extra wheels 👍
The customer service closed the deal for me. They answered all my questions in detail and responded to emails within 24 hours. Bike packaging and assembly were pain free. Make sure you follow the assembly video. I am 100% satisfied which is rare since I’ve owned and rode many bikes over the years Thank you.
The bike is great . Fit to finish is impeccable. Comin from a mukluk this bike handles way better in deep snow. Better online manuals and vids for tech would be nice tho and are lacking.
This bike is so much fun! There are so many ways you can ride it, I can’t wait to try them all! The color looked even better in person(green). As soon as I got everything together it was so well tuned that the gears shifted flawlessly first try. it was a bit more work to put together than I anticipated but I think that’s mostly because I ordered the Manitou Fork and they installed the front brake stuff on the borealis fork that it also came with and the instruction video didn’t cover anything about installing the manitou fork and subsequently swapping the brakes over to it. I was able to get it done but it definitely added a good chunk of time to the job. like I said though once it was all together the bike performed amazingly and I can’t wait for the first snow! Also their shipping was super fast they’re super on top of getting it shipped out. I’ll be back to get a full wheelset for my summer wheels/tires in the spring! Thank you!
I recently bought a fully loaded Crestone and it is by far my favorite bike yet. I have rode it in many different conditions and it’s a blast to ride. Not the fastest bike I own but the most fun.