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*** Please Note ***

This item will be ordered from our distributor and then despatched to you so please allow 7 days for delivery.


Multipurpose Hardtail Mountain Bike

Karate Monkey delivers a resilient, lively ride on all sorts of gnarly terrain. Its frame is a highly-versatile canvas for whatever dirty masterpiece your brain cooks up. According to our computing machine (Thor) it can be set up in approximately 487 different configurations.

Originally designed as a 29er (and the frame that helped spark the 29” wheel movement), the latest Karate Monkey is designed to perform just as admirably as a 27.5+ rig as well. This allows you to pick your poison — provided your poison is having a really great time while permanently donning a shit-eating grin, of course.

  • 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 2.5” or 27.5” x 3” tyres

Surly - Karate Monkey - Frame Set

SKU: karatemonkey
  • 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


    Steerer Tube

    Ø28.6mm (1-1/8")

    Crown Race

    Ø30mm (1-1/8")

    Stock Headset Upper (S.H.I.S)


    Stock Headset Lower (S.H.I.S)


    Seat Collar




    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 spacing

    Max Chainring (CL) [3]

    1x (Mtn):  28T
    2x (Mtn):  24/34T
    1x (Boost):  32T
    2x (Boost):  24/36T

    Bottom Bracket

    73mm threaded (1.37" x 24TPI)

    Tire Clearance Frame [1]/[2]

    27.5 x 3.0”
    29 x 2.5"

    Tire Clearance - Rigid Fork [1][5]

    29 x 3.0”

    Rigid Fork Spec

    483 x 47mm

    Max Suspension Fork Length [4]

    551 x 51mm (27.5+ 140mm)

    Bottle Mounts Frame

    1 Standard + 1 Three-Pack (XS - M)
    2 Standard + 1 Three-Pack (L - XL)

    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


    Fender Mounts Fork


    Other Features

    Internal dropper post routing compatible

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