Breaking the Mold with a 29er Bike

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 tires can vastly improve the ride experience. It’s also done a bang-up job dispelling the myth that big tires 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 toptube 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.

"Lean back, hang on, and ride that wild horse." -Thor

• 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

Frameset

• Frame

  • Surly Krampus - 100% Surly Chromoly steel, Natch tubing, double-butted main triangle, trumpet flaired tubes, TIG welded, E.D. coated

• Fork

  • Surly Krampus - 100% Surly Chromoly steel, Natch tubing, double-butted tapered fork blades, TIG welded, E.D. coated

Components

• Seatpost Clamp
  • Surly stainless, 33.1mm

Frame Specs

• Design Wheel/Tire Sizes
  • 29 x 3.0"
    
• Max Tire Outer Diameter
  
  • 29 x 3.0"
  • Different tire and rim combinations will result in different clearances. Depending on drivetrain configuration, tire clearance may be limited by the chain and not the frame. For suspension fork tire clearance, please reference the fork manufacturer's website.
    
• Frame Construction
  • 4130 Chromoly, Natch tubing, double-butted main triangle, trumpet flared tubes, TIG welded, E.D. coated
    
• Fork Construction
  • 4130 Chromoly, Natch tubing, double-butted tapered fork blades, TIG welded, E.D. coated
    
• Rear 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)
    
• Rear Brake (Rotor)
  • Disc - 51mm I.S. (203mm max rotor)
• Front Brake (Rotor)
  • Disc - 51mm I.S. (203mm max rotor)
    
• Headset - Upper
  • ZS44/28.6
    
• Headset - Lower
  • EC44/40
• Front Spacing
  • 15 x 110mm (Surly axle included)
    
• Crankset (Max Ring)
  • 1x (Mtn): 28T
  • 1x (Boost): 30T
  • 2x (Boost): 24/36T
    
  • Listed chainring clearance is worst-case scenario. Clearances vary widely depending on components and configurations.