Karate Monkey Ops

Item #CN_EVO12

Complete bike spec subject to change


Karate Monkey MDS, Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded

Fox Float, 1.5″ tapered steerer, 32mm 100mm travel; 15mm thru-axle mount

Seatpost clamp
Surly Stainless, 30.0mm


Shimano, Deore 2 x 10

Bottom Bracket
Shimano, SM-BB51

Front Derailleur
Shimano Deore, M616D 2x

Rear Derailleur
Shimano Deore, M615 10-speed

Cog or Cassette
Shimano, HG50

KMC X10, Yep, it’s a chain


Cane Creek 40 for 44mm, 1-1/8˝ threadless. Black

Shimano, Deore Hydraulic, 180/160

Brake Levers
Shimano, Deore

Shimano Deore, M610, front and rear 2 x 10

H.L., 31.8mm bar clamp. Aluminum. 4-bolt face. Black

Salsa, Salt Flat 700/750

Velo VL-2155, Steel rails. Black vinyl. Feels pretty o.k.

Kalloy SP-342, 27.2mm. 350mm. Black

MDS 12mm through axle only chip


Shimano, Deore

Alex, XD-Lite

DT Swiss Champion, 14g. Silver

Schwalbe Nobby Nic 2.4” [North America]
Maxxis Ardent 2.4” [all other regions], 29 x 2.4˝. Black

Frame Size Stem Length Stem Angle Handlebar Width Crank Length
Small 80 7 700 170
Medium 90 7 750 175
Large 100 7 750 175
xLarge 110 7 750 175

Surly 4130 CroMoly steel. Main triangle double-butted. TIG-welded . ED Coated (black model only).

Rear Dropouts
Surly Modular Dropout System gives you the option of 142 x 12 thru axle (Shimano Direct Mount derailleur hanger [axle included]), 10mm QR geared, or singlespeed

Brake Compatibility
51mm IS disc mounts front and rear

Dual water bottle mounts, Surly Trip Guides for continuous brake and derailleur housing

Seatpost diameter

Seatpost clamp diameter
30.0mm (Surly stainless included)

44mm ID. Recommend EC44 lower cups. Zero Stack on top is o.k.

Front Derailleur Clamp Diameter
28.6mm (high-direct) adaptor included

Bottom bracket shell
73mm wide, standard English threading (1.37˝ x 24t)

Chainring Clearance

Tire Clearance
29 x 2.55˝ knobbies. Individual tire and rim combos affect tire clearance

1-1/8 to 1.5 tapered steerer, Fox Float, 32mm 100mm travel; 15mm thru-axle mount

Spray Tan or Stretchpants Black
10 in stock
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Additional information

Weight 1 kg
Dimensions 1 x 1 x 1 cm

Spray Tan, Stretch Pants Black

Product Description

We’ve offered the Karate Monkey as a single speed build for years. It could always accept gears – we just left them off—but Surly, being the nice people we are, decided we’d give you an out of the box multi-speed option so you can start shredding the trails if gears are your thing. In many ways, it’s the same Karate Monkey we all know and love. It uses the same nimble geometry that made the Karate Monkey famous. The tubes are still our very own 4130 ‘Natch tube set we’ve all been riding around on since the beginning, plus you get all the benefits of some nice little frame updates. What are those benefits, you ask? Let’s have a look! The tip of this spear is the 44mm headtube, which allows you to run either a straight or tapered fork like the 15mm Thru-axle Fox Float 32 we’ve spec’d to keep your front wheel planted on the ground and tracking at all costs. The Surly Modular Dropout System, or MDS if you’re into the whole brevity thing, gives you the choice between horizontal, standard vertical or a 12×142 thru-axle. Framesets ship with all three chips while the complete bike will only come with the direct-mount Shimano thru-axle option. The 10 speed Deore shifty bits we’ve used will make riding a veritable breeze without breaking the bank or requiring you to break into a bank. We’ve also strayed from our usual finish option of solid powder coat colors and have instead opted for a translucent powder coat. This finish is far cooler because it gives you a window into the “soul” of the frame. Yes, you can see right down to the metal- and that’s pretty Metal. If you guessed that we took what was already a versatile and capable 29” trail bike and made it even more versatile and more capable, then you’d be exactly correct. Good work, smart guy.


L, M, S, Xl

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