As the first "plus" bike to hit the market, Krampus changed the way many people approach trail riding. It’s shown people the light of how high volume, large diameter tyres can vastly improve the ride experience. It’s also done a bang-up job dispelling the myth that big tyres make you slow.

Krampus is kind of like the opposite of a mullet: long in the front and short in the rear. With a long top tube and compact chainstays, it takes trail-shredding abilities to the next level. A mullet may be business in the front, party in the back but Krampus makes partying its business.

Specifications:

• Frame Construction: 4130 Chromoly, Natch tubing, double-butted main triangle, trumpet flared tubes, TIG welded, ED coated
• Fork Construction: 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, ED coated
• Rear Dropout Configuration: Horizontal slotted with optional vertical dumpout
• Rear Hub Spacing: "Gnot-Boost" 145mm, 12 x 142mm or 12 x 148mm (Surly axle included), 10 x 135mm with Surly 10/12 Adapter Washers (not included)
• Front Hub Spacing: 15 x 110mm (Surly axle included)
• Rear Brake: Disc - 51mm I.S. (203mm max rotor)
• Front Brake: Disc - 51mm I.S. (203mm max rotor)
• Head Tube: Ø44mm
• Steerer Tube: Ø28.6mm (1-1/8")
• Crown Race: Ø30mm (1-1/8")
• Stock Headset Upper (S.H.I.S): ZS44/28.6
• Stock Headset Lower (S.H.I.S): EC44/30
• Seat Collar: Ø33.1mm
• Seatpost: Ø30.9mm
• Front Derailleur (Clamp): High direct mount top-pull (Ø34.9mm), 26mm offset adapter (not included) for 142 or 135mm rear hub spacing, 29mm offset adapter (not included) for 148mm rear hub spacing
• Max Chainring (CL) [3]: 1x (Mtn): 28T, 1x (Boost): 30T, 2x (Boost): 24/36T
• Bottom Bracket: 73mm threaded (1.37" x 24TPI)
• Tire Clearance Frame [1]/[2]: 29 x 3.0”
• Tire Clearance - Rigid Fork [1][5]: 29 x 3.0”
• Rigid Fork Spec: 483 x 47mm
• Max Suspension Fork Length [4]: 550 x 51mm (29+ 120mm)
• Bottle Mounts Frame: 1 Standard + 1 Three-Pack
• Bottle Mounts Fork: 2 Three-Pack
• Rack Mounts Frame: Yes (upper and lower threaded)
• Rack Mounts Fork: Yes (upper, lower, and mid-blade threaded)
• Fender Mounts Frame: Yes
• Fender Mounts Fork: N/A
• Other Features: Internal dropper post routing compatible

[1] Different tire and rim combinations will result in different clearances.
[2] Depending on drivetrain configuration, tire clearance may be limited by the chain and not the frame.
[3] Listed chainring clearance is worst-case scenario.  Clearances vary widely depending on components and configurations.
[4] Suspension fork length listed at full extension (not at sag)
[5] For suspension fork tire clearance, please reference the fork manufacturer's website.