The Krampus frame is constructed using the same custom-designed, frame-specific, Surly CroMoly “’Natch” steel tubes found on many of our other trail bikes. The main triangle’s tubes are internally butted with some tubes externally tapered, flared like a trumpet and ovalized to add stiffness and strength without adding weight. When you add in the 3” tires, it makes for a resilient and lively ride that’s durable and fun as hell.
If you’re looking to ride through/over/off of obstacles, may the Krampus be your mighty steed. As Thor puts it: “Lean back, hang on, and ride that wild horse.”
Frame Highlights
- Tubing- Surly 4130 CroMoly steel. Custom double-butted trumpet tube main triangle. TIG-welded. ED coated.
- Rear Dropouts- 12mm horizontal and vertical slotted with derailleur hanger and Surly “Gnot-Boost” 135, 142, and/or 148mm hub spacing compatibility
- Brake Compatibility- 51mm I.S. disc caliper mounts, 180mm max rotor size
- Braze-ons/extras- Two down tube bottle-mounts on all sizes (SM-XL), no seat tube bosses
- Seatpost- 9mm
- Seatpost clamp- 1mm (Surly Stainless included)
- Headtube- 44mm
- Front Derailleur Clamp- 9mm, high direct-mount (not included)
- Bottom bracket- 73mm Englich Threaded
- Chainring Clearance- 30t Boost 1x, 24/36t Boost 2x
- Tire Clearance- 29 x 3.0"
- Fork- 15mm Thru-Axle, 1-1/8˝ steerer tube, 203mm disc brake clearance and 29 x 3.0" tyre clearance
- Thru Axle- HU0138 Surly 15x110 and 12x142/148 Thru Axles (included)
Specifications
- Material Surly 4130 CroMoly steel
- Fork 4130 CroMoly, 110mm hub spacing
- Seatpost 30.9mm
- Seat Clamp 33.1mm (Surly Stainless included)
- Front Derailleur 34.9mm, high direct-mount
- Dropouts 2mm horizontal and vertical slotted with derailleur hanger
- BB Shell BSA 73mm
- Rear spacing Surly “Gnot-Boost” 135, 142, and/or 148mm hub spacing compatibility
- Tyre Clearance 29 x 3.0
- Colour Andy's Apple Red or Dark Black (Frameset Only)