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”

ASSEMBLY

If you choose "No Assembly" your bike will require complete assembly with an exception of the wheels. 

If you choose "Assembled by Borealis", 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.

Assembly Video 

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.

SIZE CHART

Based on our research, riders at the heights below will usually take the corresponding frame size. If you’re at a transitional height that spans two sizes, look at the geometry chart to get the Stack and Reach you like based on other bikes you are comfortable.

BUILD SPECS

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.

OWNER'S MANUAL

Download Owner's Manual

PO boxes not accepted. Shipping discounts or exclusions only apply within the lower 48 states of the US. Contact us if damage occurs during shipping. 

Borealis offers a 30-day money-back guarantee. If you are unsatisfied with your purchase for any reason, you can cancel, exchange, or return your product for a full refund, minus any associated transaction fees and shipping costs. Customer is responsible for return shipping costs. Returned and exchanged items must be in sellable condition. Affirm transactions are subject to a 10% non-refundable transaction fee.

HIGHLIGHTS:

• Frame geometry provides responsive and nimble handling for variable conditions in snow or sand.
• Internally routed cables.
• 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 2-3 bottle cage mounts and lizard skin protectors on both the down tube and drive-side chain stay.
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SPECS

Frame includes:

• Chainstay and seatstay protectors
• Seatpost collar
• Rear axle and derailleur hanger

Frameset includes all of the above as well as:

• Complete headset and compression plug/ star nut
• Front axle

All frames are covered by a 5 year warranty and crash replacement program.

RIDER HEIGHT RECOMMENDATIONS
Based on our research, riders at the heights below will usually take the corresponding frame size. If you’re at a transitional height that spans two sizes, look at the geometry chart to get the Stack and Reach you like based on other bikes you are comfortable.

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.