2023 Surly Bikes Karate Monkey 27.5+ 140mm Front Suspension

Design
Flat Bar, Hardtail (Front suspension)
Frame
Steel
Fork
Steel
Suspension
140mm fork travel, 25% sag
Features
Disc brake, Single-speed capable
Somewhat upright stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Somewhat aggressive stack and reachvs category
Somewhat aggressive stack and reachvs category

Geometry

XS
SM
MD
LG
XL
Stack
601mm
601mm
602mm
611mm
621mm
Reach
371mm
396mm
421mm
443mm
466mm
Stack to Reach Ratio
1.62:1
1.52:1
1.43:1
1.38:1
1.33:1
Seat Tube Length, C-T
330mm
368mm
419mm
470mm
521mm
Top Tube Length, Effective/Horizontal HT Top
562mm
587mm
612mm
637mm
662mm
Top Tube Length, Actual C-C
550mm
560mm
575mm
598mm
625mm
Top Tube Slope
31.4deg
26.3deg
20.3deg
15.6deg
11.2deg
Head Tube Angle
69deg
69deg
69deg
69deg
69deg
Seat Tube Angle
73deg
73deg
73deg
73deg
73deg
Head Tube Length
100mm
100mm
100mm
110mm
120mm
Bottom Bracket Drop
51mm
51mm
51mm
51mm
51mm
Bottom Bracket Height
317.2mm
317.2mm
317.2mm
317.2mm
317.2mm
Chainstay Length
423mm
423mm
423mm
423mm
423mm
Chainstay Length Horizontal
419.9mm
419.9mm
419.9mm
419.9mm
419.9mm
Front-Center
639.1mm
664.1mm
689mm
713.9mm
739.9mm
Front-Center Horizontal
637.1mm
662.1mm
687.1mm
712.1mm
738.1mm
Wheelbase
1057mm
1082mm
1107mm
1132mm
1158mm
Fork Offset/Rake
44mm
44mm
44mm
44mm
44mm
Fork Length (Axle-To-Crown)
499mm
499mm
499mm
499mm
499mm
Trail
94.2mm
very high
94.2mm
very high
94.2mm
very high
94.2mm
very high
94.2mm
very high
Mechanical Trail
88mm
88mm
88mm
88mm
88mm
Wheel Flop
31.5mm
31.5mm
31.5mm
31.5mm
31.5mm
Standover Height
751mm
769mm
791mm
819mm
848mm
Tire to Pedal Spindle
100.9mm
170 mm cranks
125.9mm
170 mm cranks
145.8mm
175 mm cranks
170.7mm
175 mm cranks
196.7mm
175 mm cranks
Pedal Spindle to Ground Clearance
147.2mm
170 mm cranks
147.2mm
170 mm cranks
142.2mm
175 mm cranks
142.2mm
175 mm cranks
142.2mm
175 mm cranks

27.5+ 140mm Front Suspension Build

XS
SM
MD
LG
XL
Wheel Size
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
Tire Width
3in
3in
3in
3in
3in
Tire Width Max
3in
3in
3in
3in
3in
Tire Outer Diameter
736.4mm
736.4mm
736.4mm
736.4mm
736.4mm
Bike Length with Tires
1793.4mm
1818.4mm
1843.4mm
1868.4mm
1894.4mm
Crank Length
170mm
170mm
175mm
175mm
175mm
Handlebar Width
750mm
750mm
800mm
800mm
800mm
Stem Length
60mm
70mm
70mm
70mm
80mm
Stem Angle
7deg
7deg
7deg
7deg
7deg

Published Sizing Recommendations

Height
5 ft 0 in
to
5 ft 5 in
5 ft 4 in
to
5 ft 8 in
5 ft 7 in
to
6 ft 0 in
5 ft 11 in
to
6 ft 3 in
6 ft 2 in
to
6 ft 6 in

Stack and Reach vs. Category Trend

Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Learn more about the Upright/Aggressive Scale
Source:https://surlybikes.com/bikes/karate_monkey