Years ago the Karate Monkey helped start the 29-inch wheel movement and, as time's gone by, many companies – Surly included – have experimented with even more wheel sizes.
With so many different types and sizes of tires now on the market, riders have begun to understand the effect that tire width has on overall wheel diameter, and with ample tire clearance, you can see the benefits of multiple wheel sizes all on one bike. 27+ tires have the same rolling diameter as a 29-inch wheel, yet you get all the traction and floatation benefits of extra-wide knobbies. And that's just the tires.
The Karate Monkey frame has recently gotten a makeover that includes the addition of features like internal dropper post routing, a new tubeset that uses the same trumpet tubes found on Surly's Instigator 2.0, and a slight tweak in geometry that is more progressive and trail-oriented. The Karate Monkey uses a horizontal dropout with a derailleur hanger that features Gnot-Boost spacing, which gives the rider the ability to run any kind of mountain bike hub they choose. 10 x 135mm QR, 12 x 142, or 12 x 148 Boost will all work in the Karate Monkey frame. The frame uses a 44mm headtube for broad fork compatibility and is ED coated for an added layer of internal protection. If, at any point, you decide you want to throw on some skinny meats, standard 29-inch wheels and tires can be swapped in with no issue. If you want to round-house kick some trail right in the face, the Karate Monkey is your sled.
- 100% Surly 4130 chromoly steel frame and fork; double-butted main triangle and 44mm headtube
- 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
|Frame||Surly 4130 Cro-Moly Steel. Custom double butted externally flaired tubing. Horizontal slotted with derailleur hanger, Surly “Gnot Boost” 142 or 148mm hub spacing compatibility|
|Fork||483mm axle-to-crown x 47mm offset, tapered and butted straight blade, 4130 CroMoly. 51mm I.S. disc mount|
Front: 15 x 110mm
Rear:12 x 148mm
|Rims/Wheels||WTB Scraper i40|
|Tires||Surly Dirt Wizard 27 x 3, 60 tpi|
|Bottom Bracket||SRAM Powerspline|
|Rear Derailleur||SRAM NX|
|Cassette/Rear Cogs||Sunrace 11/42|
|Handlebars||Salsa Rustler 31.8mm|
|Tape/Grips||Velo single lock-on|
|Brakes||SRAM Level 180/160|
|Saddle||WTB Volt Sport|
|Seat Post||Promax 30.9mm|
* Subject to change without notice.
|Blue Porta Potty / X-Small||708752239791||BK0310|
|Blue Porta Potty / Small||708752239814||BK0311|
|Blue Porta Potty / Medium||708752239838||BK0312|
|Blue Porta Potty / Large||708752239852||BK0313|
|Blue Porta Potty / X-Large||708752239876||BK0314|
|Hi-Viz Black / X-Small||708752239890||BK0315|
|Hi-Viz Black / Small||708752239913||BK0316|
|Hi-Viz Black / Medium||708752239937||BK0317|
|Hi-Viz Black / Large||708752239951||BK0318|