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Borealis Crestone (Carbon) Eagle GX 27.5

Borealis Crestone (Carbon) Eagle GX 27.5
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Since 2013, Borealis has specialized in lightweight carbon fiber fat bikes. 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.

  • SRAM Eagle GX 12-Speed drivetrain, SRAM G2 RS brakes, rigid carbon fork, carbon handlebars, carbon seat post, HED carbon 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.


Frame Borealis Crestone Carbon
Fork Borealis Carbon Rigid
Headset FSA
Rear Shock N/A
Rims/Wheels HED Carbon 27.5
Hubs DT Swiss 350
Spokes Black
Tires Maxxis Colossus 27.5 x 4.5
Crankset SRAM Eagle GX
Chainwheel SRAM 30T X-Sync 2
Bottom Bracket SRAM DUB 100mm
Chain KMC X12
Front Derailleur N/A
Rear Derailleur SRAM Eagle GX, 12-speed
Rear Cogs SRAM Eagle GX XG-1275 Cassette - 12 Speed, 10-50t, Black
Shifters SRAM Eagle GX, trigger, 12-speed
Handlebars Borealis Carbon Bar (35mm)
Tape/Grips Borealis Ergo Grips
Stem Borealis 50mm or 70mm
Brake Levers SRAM G2 RS
Brakes SRAM G2 RS
Pedals N/A
Saddle Borealis
Seat Post Borealis Carbon Seatpost (31.6mm)

* Subject to change without notice.