Surly Karate Monkey 27.5" Rigid Mountain Bike (Organic Eggplant) (M)

Surly Karate Monkey 27.5" Rigid Mountain Bike (Organic Eggplant) (M)
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Price: $1,849.00

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Surly Karate Monkey Hardtail Mountain Bike Description:

Karate Monkey delivers a resilient, lively ride on all sorts of gnarly terrain. 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.


  • 100% Surly Chromoly steel frame, double-butted main triangle and 44mm headtube
  • The tubeset uses Surly custom trumpet tubes for greater stiffness and durability
  • Adjustable rear dropouts with 145mm Gnot-Boost spacing. Works with 142 and 148 x 12mm thru, as well as 135mm w/ 10/12 washer
  • Clearance for 27.5 x 3 or 29 x 2.55" tires 


  • Platform: Karate Monkey
  • Frame Type: Hardtail
  • Frame Material: Steel
  • Color: Organic Eggplant
  • Wheel Size: 27.5+
  • Fork Type: Rigid
  • Brake Type: Disc
  • Front Axle: 15 x 110mm TA
  • Rear Axle: 12 x 148mm TA

  • Bike Build:
  • Frame: 100% Surly Chromoly Steel. Custom double-butted, externally flared tubing. Horizontal slotted with derailleur hanger, Surly “Gnot Boost” 142 or 148mm hub spacing compatibility.
  • Fork: Surly Karate Monkey Rigid Steel w/ Rack & Fender Mounts
  • Crankset: Shimano Deore M6100  (30T)
  • Bottom Bracket: Shimano
  • Front Derailleur: N/A
  • Rear Derailleur: Shimano Deore 6100 (12-speed)
  • Cassette / Cog: OEM (11-51T) (12-speed)
  • Chain: KMC X12
  • Grips: Velo lock-on
  • Handlebar: Salsa Rustler
  • Stem: ProMax (31.8mm)
  • Headset: Cane Creek
  • Shifter: Shimano Deore 6100 (12-speed)
  • Brakes: SRAM Avid BB5 Mechanical Disc (180/160mm)
  • Saddle: Selle Italia
  • Seatclamp: Surly Stainless (33.1mm)
  • Seatpost: Kalloy Straight Post (30.0mm)
  • Front Hub: Novatec (32H) (15 x 110mm)
  • Rear Hub: Novatec (32H) (12 x 148mm)
  • Rims: WTB ST i40 TCS 2.0
  • Tires: Surly Dirt Wizard (27 x 3.0")
  • Tubes: included  
  • Pedals: *Not included

*Note: These bikes are fully built by our expert bike builders, then partially disassembled as needed for shipping. Bikes will arrive to you with some basic assembly still required.  

This product was added to our catalog on November 8, 2022

Sizing Recommendations for Riders Who Fall Between Sizes:

  • Sizing down will provide a more maneuverable ride while sizing up will provide more stability
Rider Height (Feet)Rider Height (CM)
XS4'8" - 5'142 - 152cm
S5' - 5'5"152 - 165cm
M5'5" - 5'9"165 - 175cm
L5'9" - 6'175 - 183cm

Note: All sizing recommendations are provided by the manufacturer and may differ for each rider.



    Head Tube Angle69.0°69.0°69.0°69.0°69.0°
    Head Tube Length100mm100mm100mm110mm120mm
    Seat Tube Length330mm368mm419mm470mm521mm
    BB Drop55mm55mm55mm55mm55mm
    Chainstay Length423mm423mm423mm423mm423mm
    Top Tube Length (Actual)549.7mm560.4mm575mm597.5mm624.5mm
    Top Tube Length (Effective)560mm585mm610mm635mm660mm
    Seat Tube Angle73.0°73.0°73.0°73.0°73.0°
    Standover Height743mm759mm783mm812mm827mm
    Stem Length60mm70mm70mm70mm80mm
    Stem Angle
    Handlebar Width750mm750mm800mm800mm800mm
    Crank Length170mm170mm175mm175mm175mm
    Fork Length483mm483mm483mm483mm483mm
    Fork Rake47mm47mm47mm47mm47mm

    Note: All measurements are provided by the manufacturer and may vary depending on how measurements are acquired.