Borealis Fat Bikes
Borealis builds carbon fat bikes purpose-designed for snow and sand, out of Colorado Springs. Where many fat bikes are aluminum afterthoughts, Borealis frames are engineered from the ground up as carbon fat-tire mountain bikes, keeping weight competitive with standard trail bikes. What makes a fat bike good for winter riding? Fat bikes run oversized 3.8 to 5-inch tires at low pressure, spreading rider weight over a larger contact patch so they float on snow and sand instead of sinking. Borealis frames are built specifically around this tire size, with clearance and geometry that keep the ride feeling like a normal mountain bike rather than a compromise. Are Borealis fat bikes only for snow? No — many riders use Borealis fat bikes year-round on technical singletrack for the extra traction and cushioning the big tires provide, not just in winter conditions.
Frequently Asked Questions
- Do I need a fat bike if I don't ride in snow?
- Not necessarily, but many riders choose a Borealis fat bike for extra traction and comfort on loose, technical, or sandy trails year-round, not just for winter riding.
- How much do carbon fat bikes weigh compared to aluminum?
- Borealis carbon frames shave significant weight versus aluminum fat bike frames, often bringing total bike weight closer to a standard trail mountain bike despite the larger tires and wheels.
- What tire width do Borealis fat bikes run?
- Borealis fat bikes are built around tires in the 3.8 to 5-inch range, with frame clearance suited to true fat-bike rubber rather than just plus-size tires.