A multipurpose hardtail mountain bike, the Karate Monkey delivers a resilient, lively ride on all sorts of gnarly terrain. Great for singletrack riding as well as adventurous bikepacking expeditions.
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The Surly Karate Monkey is a one bike do it all, Bikepacking, touring, mountain biking or even hectic commuter bike. Fun enough for good time and serious enough for the long haul. 



  • Oodles of frame mounts for all kinds of accessories such as racks and water bottles or micropanniers
  • Clearance for 29"x2.5" or 27.5"x3" tyres
  • 12 speed Shimano components
  • Modern trail standards: dropper post compatibility, 44mm headtube, Gnot-Boost rear spacing, thru-axles, suspension corrected fork

Brake Upgrade Super Special Offer:

In previous years these bikes came with Tektro Hydraulic disc brakes. Due to parts shortages they were switched to Avid BB5 cable disc brakes at the factory last minute. Basically we are happy to offer a Brake upgrade at the cost of the parts with no labour, if we do it while building the bike. 
These pricing options are only if we do it, out of the box, i.e. install it straight away when building your bike. We can't build the bike completely with the BB5 brakes and then swap to hydro at these prices. 
  Brake upgrade options for Surly Karate Monkey
1: Shimano Altus Hydro Disc Set- Mt200- Total cost $85 installed.
2: Shimano Deore MT500 Hydro Disc set- $175 installed 
3: Shimano Deore SLX  - $240 installed. 
4: Shimano XT  $320 installed. 
Frame100% Surly Chromoly Steel.
Fork100% Surly Chromoly Steel 483mm axle-to-crown x 47mm offset, 110mm hub spacing, tapered and butted straight blade. 51mm I.S. disc mount
HeadsetCane Creek 15
WheelsFront Hub 110mm, Novatec, 32h, Thru-Axle Rear Hub 148mm, Novatec, 32h, Thru-Axle Rims WTB ST i40 TCS
TyresSurly Dirt Wizard 27 x 3", 60 tpi, Tubeless Ready
BrakesAvid BB5 Cable Disc (upgrades available)
ShiftersShimano Deore SL-M6100
DerailleursShimano Deore RD-M6100, 12-speed
CranksetShimano Deore FC-MT510-1, 30t
CassetteSunRace CSMZ800, 11-51t, 12-Speed
Bottom bracketShimano, included with crankset
HandlebarSalsa Rustler without logo
StemPromax 31.8
SeatpostPromax 30.9
SaddleWTB Volt 142


Head Tube Angle69°69°69°69°69°
Head Tube Length100100100110120
Seat Tube Length330368419470521
BB Drop5555555555
Chainstay Length423423423423423
Top Tube Length, Actual549.7560.4575597.5624.5
Top Tube Length, Effective560585610635660
Seat Tube Angle73° 73° 73° 73° 73°
Standover Height743759783812827
Stem Length6070707080
Stem Angle
Crank Length170170175175175
Fork Length483483483483483
Fork Rake4747474747