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.
Surly - Krampus 29+ - Frame Set
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 spacingMax Chainring (CL) [3]
1x (Mtn): 28T
1x (Boost): 30T
2x (Boost): 24/36TBottom 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