The Krampus is the bike that started it all—the plus-size movement. Designed to bridge the gap between a traditional mountain bike and a fat bike, it offers incredible traction and stability without sacrificing speed. This model features Surly’s versatile Gnot-Boost rear hub spacing of 145mm, making it compatible with Boost 148 x 12mm thru-axle, 142 x 12mm thru-axle, and 135mm quick-release hubs. Rolling on high-volume 29” x 3” tires, this bike can roll over just about anything you can point it at.
- 100% Surly Chromoly steel frame and fork; double-butted main triangle and 44mm headtube
- Gnot-Boost adjustable rear dropouts for ultimate compatibility
- Internal dropper seatpost routing for modern trail setups
- 30.9mm seat tube diameter
- High-clearance design optimized for 29 x 3.0” tires
| Rear Axle | 12mm Thru x 145mm |
| Brake Type | Disc |
| Fork Type | Rigid |
| Fork Material | Steel |
| Frame Material | Steel |
| Frame Type | Rigid |
| Front Axle | 15mm Thru x 110mm |
| Platform | Krampus |
| Wheel Size | 29+ |
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