Surly
Karate Monkey
Frame
4130 Chromoly, Natch tubing, double-butted main triangle
Wheel size
27.5 x 3.0" design; also 29 x 2.5" max
Max tyre
29 x 2.5" or 27.5 x 3.0"
Sizes
5
What it can carry
Mount provision and clearance, as Surly publishes it.
Fork mounts
2 Three-Pack mounts
Bottle mounts
1 standard + 1 Three-Pack on XS-M; 2 standard + 1 Three-Pack on L-XL
Rack & fender
Rear fender mounts; rack and top-tube bag bosses not stated in source
Max tyre clearance
29 x 2.5" or 27.5 x 3.0"
Dropper post
Compatible
Geometry
All figures in millimetres except angles. Effective top tube and seat tube are the two that decide frame bag fit.
| Size | Eff. top tube | Seat tube | Standover | Head tube | Stack | Reach | Chainstay | Wheelbase | BB drop | Head angle | Seat angle |
|---|---|---|---|---|---|---|---|---|---|---|---|
| X-Small | 560 | 330 | 743 | 100 | 597 | 377 | 423 | 1053 | 55 | 69° | 73° |
| Small | 585 | 368 | 759 | 100 | 597 | 402 | 423 | 1078 | 55 | 69° | 73° |
| Medium | 610 | 419 | 783 | 100 | 597 | 427 | 423 | 1103 | 55 | 69° | 73° |
| Large | 635 | 470 | 812 | 110 | 606 | 450 | 423 | 1129 | 55 | 69° | 73° |
| X-Large | 660 | 521 | 827 | 120 | 615 | 472 | 423 | 1155 | 55 | 69° | 73° |
Source: https://surlybikes.com/products/karate-monkey-frameset-organic-eggplant — checked 2026-08-16. A dash means Surlydoesn't publish that figure; we leave it blank rather than estimate.
Note: Surly marks this source page as a legacy bike/frame model.
Find bags that fit
The bag finder can load this bike's published geometry directly — pick Surly Karate Monkey and your size, and it will check every bag in the database against your frame triangle.
Open the Bag Finder