Surly Krampus OPS Bicycle

Krampus is the evolution of the 29er mountain bike. It’s not a fat bike. True, its got 3” tires on 50mm rims, but where fat bikes are really designed for slow-speed crawling, Krampus’s frame (geometry, tubing diameter/thickness) has been designed with a long toptube and as short a rear end as it's possible with given the wheel/tire size. This, when combined with the big, wide tires, results in a mad amount of rolling inertia and grip. It rips and responds well. The big tires also offer a bit of suspension-like cushion. Krampus is a trail bike that also tackles all kinds of terrain. Krampus lives somewhere between bushwhacking, speed racing, and back lot dirt track riding, and all this makes it just plain fun to ride.

The Krampus Ops comes with a Surly OD crank, giving you far more possibilities for drivetrain (you can convert it to an off-set double by adding one of Surly chainrings and then using a direct mount standard front derailleur and an adapter to give you optimal tire clearance). The Krampus Ops also features Surly own Modular Dropout System (MDS), allowing you to change up your drivetrain according to needs. Frames ship with MDS dropouts in 10mm track end singlespeed, standard vertical with derailleur hanger and a 142 x 12mm thru-axle versions while complete bikes ship with the Shimano direct-mount thru-axle chip.

Krampus hub spacing is standard 100mm front and MDS rear chips allow you to choose either 135mm or 142 x 12mm thru-axle hubs. It’s got clearance for disc rotors up to 185mm and is designed to run a high direct mount standard front derailleur. For best chain/tire clearance, we recommend either a Surly O.D. 2x crank (which comes on the complete) or a 1x system. Other brands 2x cranks will work but may cause some chain-on-tire rub in the easiest gear combo.


Frame: Surly Krampus, Surly 4130 CroMoly steel. Main Triangle TIG-welded, custom butted. Sweet CS Yoke.

Fork: Surly Krampus, TIG-welded custom tapered butted 4130 CroMoly, 100–120mm suspension corrected, 1-1/8˝ steerer tube, 203mm disc brake clearance

Seatpost clamp: Surly Stainless, 30.0mm


Crankset: Surly, O.D. 33

Bottom Bracket: Surly, O.D. 33

Front Derailleur: MRP 1x guide. BB mount, yep

Rear Derailleur: Shimano SLX, Black

Cog or Cassette: SRAM GG-1070, 10-speed. 11-12-14-16-18-21-24-28-32-36t

Chain: KMC x10, Silver


Headset: Cane Creek, 40 series for 44mm

Brakes: Avid BB7, 180/160 HS rotors

Brake Levers: Avid FR-5, Black

Shifters: Shimano SLX, 10-speed RH

Stem: Kalloy, 31.8mm. 60/70/80/90mm length

Handlebar: Salsa, Salt Flat

Saddle: Velo VL2155, Steel rails

Extras: Chain guide


Front Hub: Surly Ultra New Disc, 32h. 6-bolt disc. Black

Rear Hub: Shimano FH-M529, 32h. Disc. Black

Rims: Surly Rabbit Hole 29+, 700c x 50mm w/holes

Spokes: DT Swiss, 14g

Tires: Surly Knard 29 x 3˝, 27tpi


Krampus OPS is also available as a frame set, get in touch for more info and availability -

2295 EUR