Surly Karate Monkey Rigid


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


The Karate Monkey is a rugged and reliable mountain bike that’s built to handle all sorts of gnarly terrain. It’s got a highly-versatile frame that you can customize to suit your individual riding style, with the help of our trusty computing machine, Thor. We’ve run the numbers and figured out that this frame can be set up in a whopping 487 different configurations, so you can dial in the perfect ride for your needs.

Now, when we first built the Karate Monkey, we made it to accommodate 29-inch wheels. And let me tell you, this bike was instrumental in getting the 29er movement off the ground. Those big 29-inch wheels give you a heap of rollover ability and plenty of traction, so you can tackle technical trails with confidence and control. But we didn’t stop there. Oh no, we made the latest Karate Monkey compatible with 27.5+ wheels as well. This gives you even more options when it comes to setting up your ride. The slightly smaller 27.5+ wheels make the bike more agile and responsive, so you can whip it around tight corners and accelerate like a wild mustang.

So there you have it, folks. The Karate Monkey is a versatile and capable mountain bike that can be set up to suit your riding style and preferences. And whether you choose 29-inch wheels for added stability and traction, or 27.5+ wheels for increased maneuverability and speed, you can count on the Karate Monkey to deliver a lively and resilient ride that’ll put a big ol’ grin on your face. So why not saddle up with the Karate Monkey, and experience the thrill of tackling rugged trails with a trusty steed by your side? Yeehaw!


  • Fork Material: Steel
  • Wheel Size: 27.5″ , 29″
  • Front Axle: 15mm Thru x 110mm
  • Brake Type: Disc
  • Platform: Karate Monkey
  • Fork Type: Rigid
  • Frame Material: Steel
  • Rear Axle: 12mm Thru x 145mm
  • Frame Type: Rigid



  • Frame: 100% Surly Chromoly Steel
  • Fork:100% Surly Chromoly Steel
  • Color: Organic Eggplant
  • Rear Shock: N/A


  • Front Derailleur: N/A
  • Rear Derailleur: Shimano Deore 6100 SGS
  • Cassette: OE 12-spd, 11-51t
  • Chain: KMC X12 Anti-Rust
  • Crankset: Shimano Deore MT510, 30t
  • Shifter: Shimano Deore, 12-spd
  • Brakes: SRAM Avid BB5 Mechanical
  • Rotors: 180F/160R


  • Headset: Cane Creek
  • Stem: Kalloy 31.8
  • Handlebar: Salsa Rustler
  • Grips / Bar Tape: Velo Black
  • Seatpost: Kalloy 30.9
  • Saddle: Selle Italia
  • Seatclamp: Surly stainless, 33.1mm


  • Front Wheel: Novatec 15×110, 32h, 6-bolt, WTB ST i35 TCS 2.0
  • Rear Wheel: Novatec 15×110, 32h, 6-bolt, WTB ST i35 TCS 2.0
  • Tires: Surly Dirt Wizard 27.5 x 3″, 60tpi, Tubeless Ready,


All Surly frames are backed by a 3-year warranty against defects in material and manufacturing.  Please see Surly’s frame warranty page to review their limitations.