Borealis Telluride EagleGX

Borealis Telluride EagleGX
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Telluride EagleGX 12 27.5

All new for 2019! The 12 speed Eagle GX Telluride is simply the best equipped alloy Fat Bike on the market in its class. Sporting carbon bars, carbon seat post and carbon fork, this ride is ready to go into any adventure you can imagine.

Borealis offers four frame designs with unique fit and geometry to suit your every Fat Bike need. Begin by taking a rough size approximation on the chart below that is based on height, then select the corresponding bike with your fit needs by using the geometry chart further below. We recommend a similar fit to you mountain bike, so grab a measuring tape and dial it in.


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 on.

The Telluride is a low Q factor, hydroformed aluminum fat-bike that embraces a trail optimized, adventure bike attitude. A 68.5 degree headtube angle is paired with the Manitou Mastodon suspension fork for shread’n the gnar-gnar. There’s also a rigid carbon fork option available. The Telluride is designed around 27.5 fat wheels with rim options from HED and Sun/Ringle. Borealis updated their Gen One Hubs for the T-Ride and the new bike will come with Terrene Cake Eater or Wazia 27.5 Tires. The rear spacing on the Telluride is 177 Thru-Axle. The 83mm bottom bracket shell sets the t-ride up with a narrow Q-Factor that is optimal for the Eagle GX (one by) drivetrain that’s capped off with a RaceFace Next Carbon Crank. The new T-ride is offered with the option of 3 decal color choices and a full range of custom builds assembled by hand by their experienced professional mechanics.


Frame Borealis Telluride 6066 Lightweight Alloy (Metallic Silver w/3 Decal Options)
Fork Borealis Carbon Rigid Fork
Headset Borealis
Rims/Wheels HED Alloy 27.5 x 80m
Hubs Borealis: Front 15×150 Rear 12×177
Spokes Wheelsmith Black
Tires Terrene Cake Eater 4.0
Crankset Race Face Next R Carbon 30 T Chain Ring
Bottom Bracket Race Face BSA30 x 83mm
Chain KMC 12 Speed
Rear Derailleur SRAM Eagle GX 12 Speed
Rear Cogs SRAM Eagle GX-1275 10-50
Shifters SRAM Eagle GX 12 Trigger
Handlebars Borealis Carbon Bar
Tape/Grips Ergon GA2
Stem Borealis 50mm/70mm for XL
Brakes SRAM Guide RS w/180mm rotors
Seat Post Borealis Carbon 31.6
Weight 27.5 lbs

* Subject to change without notice.

Part Numbers

Option MPN Store SKU
Small BIFB0022001 BIFB0022001
Medium BIFB0022002 BIFB0022002
Large BIFB0022003 BIFB0022003
X-Large BIFB0022004 BIFB0022004