
Beargrease is our carbon hotrod fat bike, designed to convert strength and determination into speed. The super light chassis and the sure-footed rollover of 27.5 x 4? wheels and tires reinforce Beargrease's objective; to keep you in the express lane wherever you're headed. Point your front wheel towards the start line of a race on groomed snow or singletrack, challenge yourself on an overnight bikepacking trip, or just get your trail riding on.
Design Wheel/Tire Size | 27.5 x 3.8" on an 82mm rim |
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Alternate Wheel/ Tire Size | 26 x 3.8-4.6" on up to a 100mm rim 27.5 x 3.0-4.0 on up to a 82mm rim 29 x 2.25-3.0" |
Susp Fork Length | 511mm (100mm) |
Rigid Fork Length | 483-486mm |
Fork Offset | 50-51mm |
Headset-Upper | IS41 |
Headset-Lower | IS52 |
Seatpost | ø30.9mm |
Seat Collar | ø35.4mm |
Dropper Compatible | Yes, internal (stealth) |
Front Derailleur Type | Not compatible |
Bottom Bracket | 100mm BSA threaded |
Crankset (Max Ring) | Fat bike ~75 chainline, 1x only (32t) |
Rear Brake (Rotor) | 74mm post (160-180mm) |
Rear Spacing | 197 x 12mm thru-axle |
Rear Axle | ø12 x 220L, TP= 1.5, TL = 20 |
Derailleur Hanger | FS2322 |
Bottle Mount Pairs | XS = 1, SM-XL = 2 |
Under Downtube Mount Pairs | XS-XL = 1 |
Top Toptube Mount Pairs | XS-XL = 1 |
Rear Rack Mounts, Lower | Yes, use Salsa Alternator Rack 170/177 |
Rear Rack Mounts, Upper | No, use Rack-Lock |
Rear Fender Mounts | No |
Optional Accessories | Split Pivot Top Cap Tool for Hanger |
Fork Design Wheel/Tire Size | 26 x 3.8-4.8" |
Fork Alternate Wheel/Tire Sizes | 26 x 3.8-4.6, 27.5 x 3.0-4.0", 29 x 2.25-3.0" |
Axle to Crown | 483mm |
Offset | 51mm |
Steerer Tube Size | 28.6mm |
Steerer Style | Tapered |
Crown Seat Diameter | 40mm |
Front Brake (Rotor) | 74mm post (160-203mm) |
Front Spacing | 150 x 15mm thru-axle |
Front Axle Size | ø15 x 198L, TP=1.5, TL=9 |
Front Rack Mounts | 165mm Low Rider |
Fender Mounts | Yes, shared with rack |
Accessory Mounts | Varies by fork spec, consult bike or frameset spec for fork spec and fork features |