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Borealis Crestone Eagle NX 12 Speed Fatbike

Borealis Crestone Eagle NX 12 Speed Fatbike
Midnight Blue/Bronze
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Since 2013, Borealis has specialized in lightweight carbon fiber fat bikes. The tried and true Crestone is our flagship model, weighing under 30 pounds with standard options. Its 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.


Frame geometry provides responsive and nimble handling for variable conditions in snow or sand.
Standard features include: Eagle NX 12-Speed drivetrain, rigid carbon fork, carbon handlebars, carbon seat post, durable Mulefut rims and 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 3 bottle cage mounts and lizard skin protectors on both the down tube and drive-side chainstay.

Crankset SRAM Eagle NX
Crank Arms 175mm Alloy
Rear Derailleur RD ENX 1 x 12
Chain KMC X12
Cassette PG 1230 11-50
Shifters SRAM ENX
Brakes SRAM - Select
Chain Ring 30 Tooth
Frame Borealis Crestone Carbon
Fork Borealis Carbon Rigid Fork or RL Bluto, Mastodon Pro Ext.
Headset Borealis
Hubs Borealis: Front 15×150 Rear 12×197
Rims Your Choice
Spokes Wheelsmith Black
Nipples Wheelsmith Silver Brass
Tires Your Choice
Bar Borealis Carbon Bar (35mm)
Stem Borealis 50mm or 70mm
Post Borealis Carbon Seatpost (31.6mm)
Saddle Borealis
Grips Borealis
Bottom Bracket SRAM DUB 100mm
DT/CS Protector Lizard Skins