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Surly Bikes

BK2015

Surly Karate Monkey 27.5+

The Karate Monkey features updated, progressive trail geometry, a new tubeset and Surly’s Gnot-Boost rear dropout system. Available in a variety of colors, with multiple drivetrain and wheel size configurations.

  • 100% Surly 4130 chromoly steel frame and fork; double-butted main triangle and 44mm headtube
  • Tubeset uses the same trumpet tubes found on Instigator 2.0 frame
  • Adjustable rear dropouts with 145mm Gnot-Boost spacing. Works with 142, 148 12mm thru, as well as 135mm w/ 10/12 washer
  • Internal dropper seatpost routing with 30.9mm seat tube ID
  • Clearance for 29 x 2.55 or 27.5 x 3 tires
  • Color: Wet Clay

    Frameset

    Frameset

    Frame

    Surly 4130 Cro-Moly Steel. Custom double butted externally flaired tubing. Horizontal slotted with derailleur hanger, Surly “Gnot Boost” 142 or 148mm hub spacing compatibility

    Fork

    483mm axle-to-crown x 47mm offset, 110mm hub spacing, tapered and butted straight blade, 4130 CroMoly. 51mm I.S. disc mount

    Drivetrain

    Crankset

    SRAM SX EAGLE 30t

    Bottom Bracket

    SRAM Powerspline

    Front Derailleur

    n/a

    Rear Derailleur

    SRAM SX EAGLE

    Cassette / Cog

    SRAM EAGLE 11/50t

    Chain

    SRAM SX EAGLE

    Components

    Grips / Bar Tape

    Velo single lock-on

    Handlebar

    Salsa Rustler 31.8

    Stem

    Promax 31.8, 4-Bolt

    Headset

    Cane Creek

    Front Shifter

    n/a

    Rear Shifter

    SRAM SX Eagle

    Brake Levers

    Tektro HD-M275

    Brakes

    Tektro HD-M275

    Rotors

    Tektro 180/160mm

    Saddle

    WTB Volt Sport

    Seatclamp

    Surly Stainless

    Seatpost

    Promax 2-Bolt

    Wheels

    Front Hub

    110mm, 15mm thru-axle, 32h

    Rear Wheel

    148mm, 12mm thru-axle, 32h

    Front Thru Axle / QR

    Thru Axle

    Rear Thru Axle / QR

    Thru Axle

    Rims

    WTB ST i40 TCS

    Tires

    Surly Dirt Wizard 27 x 3”, 60 tpi Tubeless Ready

    Tubes

    Included

    Other

    Pedals

    not included

    * Specifications are subject to change without notice



    Frame measurements (mm) XS SM MD LG XL
    A. BB Drop 55 55 55 55 55
    B. Chainstay Length 423 423 423 423 423
    C. Fork Length - Axle to Crown 483 483 483 483 483
    D. Fork Offset 47 47 47 47 47
    E. Head Tube Angle (deg) 69.0 69.0 69.0 69.0 69.0
    F. Headtube Length 100 100 100 110 120
    G. Reach 377 402 427 450 472
    H. Seat Tube Angle (deg) 73.0 73.0 73.0 73.0 73.0
    I. Seat Tube Length - Center to Top 330 368 419 470 521
    J. Stack 597 597 597 606 615
    K. Standover 743 761 783 811 840
    L. Top Tube Length (Effective) 560 585 610 635 660
    M. Wheelbase 1053 1078 1103 1129 1155
               
    Component measurements (mm)
    Crank Arm Length 165 170 175 175 175
    Handlebar Width 750 750 800 800 800
    Handlebar Rise / Drop 20 20 20 20 20
    Stem Length 60 70 70 70 80
    Stem Angle (deg) 7 7 7 7 7

    * All dimensions are preliminary and subject to change


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