Bath Outdoors Surly Karate Monkey - What we have to say:
Update: The Surly KM has been discontinued :( So these are our last few in stock and we plan to do them proud with some stunning builds.
We're long term fans of the Surly Karate Monkey. This is one of the most versatile steel hardtails out there and an iconic bike any cyclist would love to own. We have built this up as a rigid steel hardtail 27.5 plus tyre, Shimano 1x12 speed format.
We have used Surly, Hope, Shimano, Halo and Gusset components in the build. The Surly Silver Terminal bar sets this build off, Hope headset pisses excellence, Shimano is built for UK riding at its worst, Halo Wheels roll like a dream but can take the hits with Gusset components adding UK style to the build. Hope, Halo and Gusset are also British brands which we're a fan of! We've sprinkled in a bit of silver to make the frame pop....
Any questions about this build? Feel free to email us or give us a call at the shop for more information or to chat through the build kit.
This is what Surly have to say about the Karate Monkey:
Karate Monkey delivers a resilient, lively ride on all sorts of gnarly terrain. Its frame is a highly-versatile canvas for whatever dirty masterpiece your brain cooks up. According to our computing machine (Thor) it can be set up in approximately 487 different configurations.
Originally designed as a 29er (and the frame that helped spark the 29” wheel movement), the latest Karate Monkey is designed to perform just as admirably as a 27.5+ rig as well. This allows you to pick your poison — provided your poison is having a really great time while permanently donning a shit-eating grin, of course.
Modern trail standards: dropper post compatibility, 44mm headtube, Gnot-Boost rear spacing, thru-axles, suspension corrected fork
Compatibility with most mountain bike standards makes it the perfect parts bin bike (no rim brakes allowed though)
Clearance for 29” x 2.5” or 27.5” x 3” tires
Frameset & Build Kit:
Frame: 100% Surly Chromoly Steel
Custom double butted externally flaired 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. 51mm I.S. disc mount
Seatclamp: Surly Stainless Steel 33.1mm
Drivechain -
Crankset: Shimano Deore 6100 170mm - 30T
Bottom Bracket: Shimano M8000
Front Derailleur: N/A
Rear Derailleur: Shimano Deore 6100 12sp
Cassette: Shimano CS-M6100 11-51T
Chain: Shimano 6100 12sp
Components -
Headset: Hope Silver Headset
Brakes: Shimano SLX 7100 2 pot
Brake Levers: Shimano SLX 7100
Rotors: Shimano 180mm Centre Lock
Shifters: Shimano Deore 6100 12sp
Stem: Gusset Staff Stem 70mm
Handlebar: Surly Terminal Silver 40mm Rise
Grips: Ergon
Saddle: Gusset R-Series Black Jack
Seatpost: Genetic
Wheels -
Front Wheel: Halo Vapour MTC 27.5" 110mm Boost
Rear Wheel: Halo Vapour MTC 27.5" 148mm Boost
Tyres: Surly Dirt Wizard 27.5 x 2.8

| SIZE | XS | SM | MD | LG | XL |
| Reach | 377 | 402 | 427 | 450 | 472 |
| Stack | 597 | 597 | 597 | 606 | 615 |
| Head Tube Angle | 69.0° | 69.0° | 69.0° | 69.0° | 69.0° |
| Head Tube Length | 100 | 100 | 100 | 110 | 120 |
| Seat Tube Length | 330 | 368 | 419 | 470 | 521 |
| BB Drop | 55 | 55 | 55 | 55 | 55 |
| Wheelbase | 1053 | 1078 | 1103 | 1129 | 1155 |
| Chainstay Length | 423 | 423 | 423 | 423 | 423 |
| Top Tube Length, Actual | 549.7 | 560.4 | 575 | 597.5 | 624.5 |
| Top Tube Length, Effective | 560 | 585 | 610 | 635 | 660 |
| Seat Tube Angle | 73.0° | 73.0° | 73.0° | 73.0° | 73.0° |
| Standover Height | 743 | 759 | 783 | 812 | 827 |
| Stem Length | 60 | 70 | 70 | 70 | 80 |
| Stem Angle | 7° | 7° | 7° | 7° | 7° |
| Handlebar Width | 750 | 750 | 800 | 800 | 800 |
| Crank Length | 170 | 170 | 175 | 175 | 175 |
| Fork Length | 483 | 483 | 483 | 483 | 483 |
| Fork Rake | 47 | 47 | 47 | 47 | 47 |