Surly Karate Monkey Fool's Gold - Rigid Fork

Name: Surly Karate Monkey Fool's Gold - Rigid Fork
Brand: Surly

2023 MountainTrail Manufacturer page

Last known price: $2,599

Prices shown first for United States
Suspension: Rigid
Wheels: 27.5″
Drivetrain: 1 × 12 30t / 11–51t
Gear range: 464%
Frame: Steel
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 156–166
SM 163–174
MD 171–182
LG 179–189
XL 185–195

Components

19 of 21 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

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 Not identified

Suspension

1 part

Fork
- Surly

Drivetrain

7 parts

Bottom bracket
- Shimano
Cassette
- SunRace 11–51t
Chain
- KMC
Crankset
- Shimano FC-MT510-1 12 speeds 30t
FC-MT510
Front derailleur

None
Rear derailleur
- Shimano Deore RD-M6100 12 speeds
RD-M6100
Shifters
- Shimano Deore SL-M6100 12 speeds
SL-M6100

Brakes

3 parts

Wheels and tires

4 parts

Cockpit and contact points

6 parts

Grips

Velo - lock on Not identified
Handlebar
- Salsa
Headset
- Cane Creek
Saddle
- WTB Volt
Seatpost
- ProMax
Stem
- ProMax

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 412mm

Stack 608mm

Wheelbase 1121mm

Head angle 67.5°

Seat angle 71.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	361	387	412	434	457
Stackmm	607	607	608	617	627
Top tube lengthmm	565	590	615	640	665
Seat tube lengthmm	330	368	419	470	521
Head tube lengthmm	100	100	100	110	120
Head tube angle	67.5°	67.5°	67.5°	67.5°	67.5°
Seat tube angle	71.5°	71.5°	71.5°	71.5°	71.5°
Chainstay lengthmm	423	423	423	423	423
Wheelbasemm	1071	1096	1121	1147	1172
Front centermm	652	677	702	728	753
Bottom bracket dropmm	44	44	44	44	44
Bottom bracket heightmm	311	311	311	311	311
Standover heightmm	757	775	797	826	855
Fork rakemm	51	51	51	51	51
Trailmm	91	92	92	92	94
Stack/reach ratio	1.68	1.57	1.48	1.42	1.37
Suspension and parts
Crank lengthmm	170	170	175	175	175
Handlebar widthmm	750	750	800	800	800
Stem lengthmm	60	70	70	70	80
Stem angle	7°	7°	7°	7°	7°

Not published by the manufacturer: Front travel, Rear travel, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Steel
Fork material: Steel

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 51
Lowest gear: 16.2 in
Highest gear: 75.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire clearance: Maximum tire width: 2.5″
Tire width: 3″
Travel: Front: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 27.5″

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

16.2 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2023
Sample: 1,625 bicycles with this information
Coverage: 72.2% of the class

Highest gear

75.0 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2023
Sample: 1,625 bicycles with this information
Coverage: 72.2% of the class

Shifting

Mechanical

359 of 2,248 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2023
Sample: 2,248 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.2 km/h
Highest gear: 28.7 km/h

Total gear range 464%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 16.2–75.0 gear inches
Class reference (p10–p90): 17.1–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2023
Lowest gear: 1625 bicycles with this information, 72.2% of the class
Highest gear: 1625 bicycles with this information, 72.2% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2023 builds

Differences across 2023 builds
Specification	This bicycle Surly Karate Monkey Fool's Gold - Rigid Fork	Surly Karate Monkey	Surly Karate Monkey Organic Eggplant - Rigid Fork	Surly Karate Monkey Peach Salmon Sundae - Rock Shox 35 Gold RL
Frame
Fork material	Steel	Steel	Steel	Not informed
Suspension
Suspension configuration	Rigid	Rigid	Rigid	Hardtail
Front travel	Not informed	Not informed	Not informed	140 mm
Drivetrain
Smallest sprocket	11	Not informed	11	11
Largest sprocket	51	Not informed	51	51
Lowest gear	16.2 in	Not informed	16.2 in	16.2 in
Highest gear	75.0 in	Not informed	75.0 in	75.0 in
Brakes
Brake type	Hydraulic disc	Mechanical disc	Mechanical disc	Hydraulic disc
Cockpit
Seatpost	Rigid seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost
Other specifications
Suspension	Rigid	Rigid	Rigid	Hardtail
Tire width	3″	3″	3″	2.8″
Fork spring	Not informed	Not informed	Not informed	Air