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ORDER NOW! Current lead time is 3-4 weeks for complete bikes.

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

$1,999.00 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 exchange your product or return it 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.




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 9 reviews
Rick Hennessy
Very Nice Bike

I would highly recommend anybody looking for a Fat Bike, this is the bike! I chose to assemble it myself and the quality of this bike is outstanding. You cannot beat the value for what is included with a Borealis Fat Bike.

Kyrstin O’Brien
Absolutely love it!

Feels so comfortable and very light! Love the gx groupset and the video to get it set up was helpful! Could have gone a little slower but I just paused when I needed! The color is actually so neat, went with the midnight blue. Looks black, dark blue, and purple in different lighting!

Steven Klein
Favorite Bike!

I custom built my Crestone and received it within about a week. IT IS AWESOME! I have a gravel bike and a hard tail 29er that I ride a lot. As much as I like those bikes, my Crestone is now by far my favorite! The single track is covered in leaves this time of year. I fly through the trail with confidence and no slippage. It is lightweight, has great components, and outstanding ergonomics. Stop looking. Buy one!

Gary Hatton
Ripping singletrack on this

Can't wait for snow! For now I'm crushing front range singletrack and it really comes down to weight of the bike. It is 26lbs with 7lb YKY tires. 26lbs and 14lbs is just tires! They roll. They grip. The bike has a great geo and can climb. Out of the saddle I'm hammering climbs. Doesn't like to get airborne is the only thing I can think of, but hey - buy something else for that. I'm locked in now. Love this bike

Dave W.
Great Learning Experience

I had never built a bike from just a bare frame before so I thought I'd give it a try. Thankfully you can learn anything from Youtube! Had one question for the guys at Borealis and they got right back to me with an answer. I was very happy with the customer service and the deal I got on the bike was awesome.

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.


Eagle NX Eagle GX Eagle X01 Eagle XX
Crankset SRAM Eagle NX SRAM Eagle GX SRAM Eagle X01 SRAM Eagle XX
Crank Arms 175mm Alloy 175 Alloy 175mm Carbon 175mm Carbon
Rear Derailleur RD ENX 1 x 12 RD EGX 1 x 12 RD EXO 1 x 12 RD EXX 1 x 12
Chain KMC X12 KMC X12
Cassette PG 1230 11-50 XG 1275 10-52 XG 1295 10-52 XG 1299 10-50 Gold
Shifter SRAM Eagle NX SRAM Eagle GX SRAM Eagle X01 SRAM Eagle XX1
Brakes SRAM - Select SRAM - Select SRAM - Select SRAM - Select
Chain Ring SRAM 30T X-Sync
Frame Borealis Crestone Carbon
Fork Borealis Carbon Rigid Fork
Headset FSA
Hubs Borealis: Front 15×150 Rear 12×197
Rims 26" or 27.5" Sun Ringle Mulefut V2
Spokes Borealis Straight Gauge
Nipples Borealis Silver Brass
Tires Your Choice
Bar RaceFace Next SL Carbon 740x10mm OR Borealis Carbon (based on supply)
Stem Borealis 50mm or 70mm
Post RaceFace Next SL Carbon 31.6
Saddle Borealis
Grips Borealis
Bottom Bracket SRAM DUB 100mm
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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