The Karate Monkey helped set the standard for 29er geometry. While its tucked-in rear wheel keeps it nimble and maneuverable, its lack of shifting componentry keeps the bike simple — and the rider filled with a cathartic rage.
With a frame and fork made of custom-designed Surly CroMoly “’Natch” steel, the Karate Monkey delivers a resilient, lively, durable ride. The Karate Monkey frame has recently been updated to include features like internal dropper post routing, a new tubeset that uses the same trumpet tubes found on our 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 spaced to what we call Gnot-Boost spacing. 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.
FRAME HIGHLIGHTS
Tubing - Surly 4130 CroMoly Steel ‘Natch tubing
Rear Dropouts - Horizontal slotted with derailleur hanger; Surly “Gnot Boost” 135, 142, or 148mm hub spacing compatibility, threaded fender eyelets
Brake Compatibility - 51mm I.S. disc caliper mounts, 180mm max rotor size
Braze-ons/extras - Dual bottle-mounts on XS–M, three bottle-mounts on LG–XL, dropper post routing, rack and fender mounts
Seatpost diameter - 30.9mm
Seatpost clamp diameter - 33.1mm (Surly stainless included)
Headset/Steerer Tube - 44mm
Front Derailleur Clamp Diameter - 34.9mm, high direct-mount
Bottom bracket shell - 73mm
Chainring Clearance - 32t Boost 1x, 24/36t Boost 2x, 28t 1x, 24/34t 2x
Tire Clearance - 27.5 x 3.0˝ and 29 x 2.5˝, individual tire and rim combos affect tire clearance
Fork - 140mm travel suspension fork compatible (547mm A-to-C max)
Thru Axle - HU0138 Surly 15x110 Front Thru Axle
HU0134 Surly 12x142/148 Rear Thru Axle
GEOMETRY
| | XS | S | M | L | XL |
|---|
Seat Tube Length
(Center-Top) |
330 |
368 |
419 |
470 |
521 |
|---|
Top Tube Length
(Center-Center) |
557 |
568 |
582 |
604 |
630 |
|---|
Effective Top Tube Length
(Center-Center) |
560 |
585 |
610 |
635 |
660 |
|---|
| Head Tube Angle |
69.0 |
69.0 |
69.0 |
69.0 |
69.0 |
|---|
| Seat Tube Angle |
73.0 |
73.0 |
73.0 |
73.0 |
73.0 |
|---|
| BB Drop |
55 |
55 |
55 |
55 |
55 |
|---|
| Chainstay Length |
423 |
423 |
423 |
423 |
423 |
|---|
