Krampus 29+ Frameset

'Surly's Krampus' is a dedicated 29+ hardtail mountain bike, made to handle any terrain you could wish to pedal over.

The Krampus, as the first “plus” bike, changed trail riding by showcasing the benefits of large, high-volume tires. These tires improve traction, stability, and comfort without slowing you down, challenging the old belief that big tires make you less speedy.

Incorporating a unique design with a long top tube and short chainstays, which enhances its performance on trails. This setup improves handling and stability, making it well-suited for tough trails. Unlike the “business in the front, party in the back” mullet bike, the Krampus focuses on making trail riding exciting and enjoyable.

The frameset includes a rigid front fork, front and rear thru-axles, and a seatpost clamp.

Features:

• Modern trail standards: dropper post compatibility, 44mm headtube, Gnot-Boost rear spacing, thru-axles, suspension corrected fork
• Compatibility with most mountain bike standards makes it the perfect parts bin bike (no rim brakes allowed though)
• Clearance for 29" x 3" tires
  

Specification:

• Frame: 4130 Chromoly, Natch tubing, double-butted main triangle, trumpet flared tubes, TIG welded, ED coated
  
• Fork: 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, ED coated
• Headset: Cane Creek 40, Upper - ZS44/28.6 & Lower - EC44/30
• 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 - 44mm
• Steerer Tube - 28.6mm (1-1/8")
• Crown Race - 30mm (1-1/8")
• Stock Headset Upper - ZS44/28.6
• Stock Headset Lower - EC44/30
• Seat Collar - 33.1mm
• Seatpost - 30.9mm
• Max Chainring - 1x (Mtn): 28T, 1x (Boost): 30T, 2x (Boost): 24/36T
• Bottom Bracket -73mm threaded (1.37" x 24TPI)
• Tire Clearance Frame - 29 x 3.0”
• Tire Clearance - (Rigid Fork) 29 x 3.0”
• Rigid Fork Spec - 483 x 47mm

You can find the Surly bike sizing here for reference.

Please contact us at support@biketart.com to discuss components or to arrange a full custom build.