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Upgraded Version New Surly Karate Monkey Steel Rigid Mountain Bike - Fool's Gold - Exclusive Drop [EjheLKDb]

$73.99 $236.99 -69%

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.100% Surly Chromoly steel

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Upgraded Version New Surly Karate Monkey Steel Rigid Mountain Bike - Fool's Gold - Exclusive Drop [EjheLKDb]

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.
  • 100% Surly Chromoly steel frame and fork; double-butted main triangle and 44mm headtube
  • The 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

BUILD KIT:

  • 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 / Bar Tape: Velo lock-on
  • Handlebar: Salsa Rustler without logo
  • Stem: ProMax, 31.8
  • Headset: Cane Creek 15
  • Rear Shifter: Shimano Deore SL-M6100
  • Brake & Rotors: Tektro HD-M275, 180mm front & 160mm rear
  • Saddle: WTB Volt 142
  • Seatclamp: Surly stainless, 33.1mm
  • 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 29 x 3”, 60 tpi, Tubeless Ready

SIZING: Surly recommends the following sizes based on rider height:

  • XS : 5' - 5'5"
  • SM : 5'4" - 5'8"
  • MD : 5'7" - 6'
  • LG : 5'11" - 6'3"
  • XL : 6'2" - 6'6"

What Our Customers Say

January 23, 2026

Absolutely no complaints!

A great item that is very, very powerful.

- Oakley R..

January 23, 2026

Absolutely no complaints!

This is a very good and a very clever tool.

- Kole W..

January 23, 2026

Absolutely no complaints!

Really, really, really pleased with this purchase.

- Heather C..

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