Surly Karate Monkey 27.5" Rigid Mountain Bike (Fool's Gold) (XS)

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Price: $1,775.00


  • XS
  • S
  • M
  • L
  • XL

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This Karate Monkey features a steel front fork for rigid rip speed.  Progressive trail geometry and Surly’s Gnot-Boost rear dropout system deliver a versatile bike with the ability to swap hubs and wheel sizes. If you want to round-house kick some trail right in the face, the Karate Monkey is your sled.


  • 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
  • Internal dropper seatpost routing with 30.9mm seat tube ID
  • Clearance for 27.5 x 3 or 29 x 2.55" tires 
Platform: Karate Monkey 
Frame Type: Rigid         
Frame Material: Steel
Color: Fool's Gold
Wheel Size: 27.5+ 
Fork Type: Rigid          
Brake Type: Disc 
Front Axle: 15mm Thru x 110mm 
Rear Axle: 12mm Thru x 148mm 
TT (Effective): 610         

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: 100% Surly Chromoly Steel 483mm axle-to-crown x 47mm offset, 110mm hub spacing, tapered and butted straight blade, 4130 Chromoly. 51mm I.S. disc mount 
Crankset: Shimano Deore FC-MT510-1 (30T)          
Bottom Bracket: Shimano, included with crankset 
Front Derailleur: N/A 
Rear Derailleur: Shimano Deore RD-M6100, 12-speed 
Cassette / Cog: SunRace CSMZ800, 11-51t, 12-Speed 
Chain: KMC X12 NP/BK 
Grips: Velo lock-on 
Handlebar: Salsa Rustler without logo 
Stem: ProMax, 31.8 
Headset: Cane Creek 15 
Shifter: Shimano Deore SL-M6100            
Brakes: Tektro Gemini HD-M275 , 180mm front & 160mm rear 
Saddle: WTB Volt 142 
Seatclamp: 33.1mm Surly Stainless 
Seatpost: ProMax 30.9 
Front Hub: 110mm, Novatec, 32h, Thru-Axle 
Rear Hub: 148mm, Novatec, 32h, Thru-Axle 
Rims: WTB i40 TCS           
Tires: Surly Dirt Wizard 27.5 x 3.0", 60tpi Tubeless Ready 
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 December 23, 2020