26×4.8 Fat Bike

When we set out to design our fat bike, we knew we wanted three things: a robust steel frame, maximum floatation, and an updated rider position.  Taking inspiration from the Weasel, the Beaver frame is a blend of butted tubing and straight gauge 4130 steel tubing complimented by Paragon frame components.  With a 197 rear spacing and the yoke plate design of the chainstays, there is ample room for a 4.8 inch tire on a 100mm rim.  The (relatively) short chainstay length pulls the rear wheel under the rider, while the taller head tube gives the rider a more upright body position (and reduces the tall spacer often seen on fat bikes).  These two features combine to distribute more of the rider’s weight over the rear wheel, which allows the front tire to “float” over the snow, rather than bury in.  The newer generation of big wheel forks offer a 51mm offset which allows us to keep the front end slack and maintain responsive handling.

As with “The Weasel”, “The Beaver” takes its name from a local trail or landmark: in this case, Beaverhead-Deerlodge National Forest.  Many in the Bitterroot are drawn to Skalkaho Pass during winter for the many recreational opportunities, including fat biking, at the top of which is access to the vast Beaverhead-Deerlodge National Forest.


Classification: Fat Bike

Wheel Size: 26X4.8

Front Fork: Rigid Carbon Fork: 51mm offset

Frame Material: 4130 Chromoly Tubing

Rear Axle Spacing: Paragon Dropouts, 12mmx197mm

Headtube: Paragon internal/external relief, 44mm

Bottom Bracket: Paragon, 1.50inx120mm, threaded

Seat Post: 31.6mm  Seat Collar: 34.9mm


27.5plus 29er geometry




*All builds are subject to change due to component availability.