Karate Monkey –

Organic Eggplant

Singletrack • Doubletrack • Bikepacking
Multipurpose Hardtail Mountain Bike

Karate Monkey is one of Surly’s most adaptable hardtails — a lively, durable rig built for everything from rowdy singletrack to big backcountry overnighters. The frame is a blank canvas for any setup you can imagine, with compatibility across modern trail standards and wheel sizes.

Originally a 29er pioneer, the current Karate Monkey also runs 27.5+ with equal confidence. Whether you’re smashing roots, cruising doubletrack, or loading up bags for a bikepacking trip, it delivers a playful, capable ride that keeps you grinning all day.

Key Features

• Modern trail standards: dropper post compatibility, 44mm headtube, Gnot-Boost rear spacing, thru-axles

• Works with a huge range of MTB components — ideal for parts-bin builds

• Clearance for 29 × 2.5” or 27.5 × 3.0” tires

• ED-coated frame + fork for extra corrosion protection

• Designed for versatility, durability, and endless configuration options

• No rim brakes supported

Specifications

Frameset

• Frame: Surly Karate Monkey — 4130 Chromoly, Natch tubing, double-butted main triangle, trumpet flared tubes, TIG-welded, ED-coated

• Fork: Surly Karate Monkey — 4130 Chromoly, Natch tubing, double-butted tapered blades, TIG-welded, ED-coated

• Color: Fool’s Gold

Components

• Headset: Cane Creek 15

• Seatpost Clamp: Surly Stainless, 33.1mm

• Seatpost: Promax 30.9mm

• Stem: Promax 31.8mm

• Handlebar: Salsa Rustler

• Grips: Velo Lock-On

• Saddle: WTB Volt 142

Drivetrain

• Front Derailleur: N/A

• Rear Derailleur: Shimano Deore RD-M6100 (12-speed)

• Shifter: Shimano Deore SL-M6100

• Crankset: Shimano Deore FC-MT510-1, 30T

• Cassette: SunRace CSMZ800, 11–51T (12-speed)

• Chain: KMC X12 NP/BK

• Brake Levers: Tektro HD-M275

• Brake Calipers: Tektro HD-M275

• Bottom Bracket: Shimano

• Rotors: Tektro 180mm front / 160mm rear (6-bolt)

Wheels

• Rims: WTB ST i40 TCS 27.5"

• Front Hub: Novatec 15×110mm, 32H

• Rear Hub: Novatec 12×148mm, 32H

• Front Tire: Surly Dirt Wizard 27.5 × 3.0", 60 TPI, Tubeless Ready

• Rear Tire: Surly Dirt Wizard 27.5 × 3.0", 60 TPI, Tubeless Ready

Specifications are subject to change without notice.