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Independence Day SALE - 20% OFF COMPLETE BIKES & FRAMES ENDS 7/15 - Discount automatically applied in cart!

0% APR up to 24 months with Affirm! Financing Options Available at Checkout.

$2,199.00 USD

Size Chart

bike size chart

Shipping and Returns

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.




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.

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.


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.
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Customer Reviews

Based on 17 reviews
StacyLyyne Twohig
Just what I was looking for

Went to a local bike shop where I was able to test ride a fat bike (been on the fence about getting one). Salesman was super informative. Advised me to go to the website and build what I wanted. Easy process. Quick delivery. Nice looking bike. Smooth ride.

Laura Pyle
My new bike is the BEST

I received my new Borealis bike, it came in 2 boxes and was easy to assemble with the tool that came with the bike. I have been riding the trails every day! It is so light weight and handles beautifully around the turns. Plus its gorgeous!!

M Wallace

What a great bike, absolutely love it!!

Karl Delzotti
Fantastic bike

Love this bike!!!

Jesse Brown
Excellent service and product

Rarely do I take the time to write a review, but felt compelled after my recent experience with the purchase of my crestone Fat bike. Love the ability to spec your build on their website, shipping was faster than anticipated. Sadly the Bike was delivered with damage to the carbon frame, I immediately reached out to Borealis and they promptly responded and we came up with a fair solution. Great customer service/support. And the bike is amazing!

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.


  • 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.


  • 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.


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.


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




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



Download Owner's Manual


  • 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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