Surly Krampus: The Original Plus-Size Trail Pioneer

Born to redefine off-road boundaries, the Surly Krampus sparked the plus-size bike revolution with its aggressive versatility. Engineered for riders who demand traction and durability on rugged singletracks or backcountry adventures, its 100% 4130 CroMoly steel frame and fork absorb trail chatter while the double-butted main triangle ensures lightweight strength.

Key Upgrades & Compatibility:
– Adjustable Gnot-Boost Dropouts: Seamlessly switch between Boost 148x12mm, 142x12mm thru-axles, or 135mm quick-release hubs for wheel flexibility.
– Optimized Tube Design: Borrowing the trumpet tubes from Surly’s Karate Monkey, it balances stiffness and compliance for technical climbs.
– Dropper-Ready: Internal routing for a clean dropper post setup (fits 30.9mm seatposts).
– Tire Capacity: Roomy clearance for 29×3.0″ tires to float over sand, snow, or loose terrain.

Why Choose Krampus?
| Feature | Krampus Advantage | Typical Hardtails |
|————–|——————|——————|
| Frame Material | 4130 CroMoly steel (impact-resistant) | Often aluminum (harsher ride) |
| Hub Options | 3-in-1 dropout system | Fixed spacing |
| Tire Clearance | Fits plus-size tires for grip | Limited to narrower widths |

Ideal for bikepacking enthusiasts and trail riders seeking a steel-hardtail with future-proof adaptability, the Krampus thrives where others hesitate—muddy descents, rocky ascents, or all-day epics.

Note: 44mm headtube ensures compatibility with modern forks.