2020 Surly Bikes Karate Monkey 27.5+ 140mm Front Suspension

Design
Flat Bar, Hardtail (Front suspension)
Frame
Steel
Fork
Steel, 140mm travel
Features
Disc brake, Single-speed capable
Somewhat upright stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Geometry

XS
SM
MD
LG
XL
Stack
607mm
607mm
608mm
617mm
627mm
Reach
361mm
387mm
412mm
434mm
457mm
Stack to Reach Ratio
1.68:1
1.57:1
1.48:1
1.42:1
1.37:1
Seat Tube Length, C-T
330mm
368mm
419mm
470mm
470mm
Top Tube Length, Effective/Horizontal Unknown
565mm
590mm
615mm
640mm
640mm
Head Tube Angle
67.5deg
67.5deg
67.5deg
67.5deg
67.5deg
Seat Tube Angle, Unknown
71.5deg
71.5deg
71.5deg
71.5deg
71.5deg
Head Tube Length
100mm
100mm
100mm
110mm
120mm
Bottom Bracket Drop
44mm
44mm
44mm
44mm
44mm
Bottom Bracket Height
324.2mm
324.2mm
324.2mm
324.2mm
324.2mm
Chainstay Length
423mm
423mm
423mm
423mm
423mm
Chainstay Length Horizontal
420.7mm
420.7mm
420.7mm
420.7mm
420.7mm
Front-Center
651.8mm
676.7mm
701.7mm
727.6mm
752.6mm
Front-Center Horizontal
650.3mm
675.3mm
700.3mm
726.3mm
751.3mm
Wheelbase
1071mm
1096mm
1121mm
1147mm
1172mm
Fork Offset/Rake
51mm
51mm
51mm
51mm
51mm
Fork Length, Unknown
521mm
521mm
521mm
521mm
521mm
Trail
97.3mm
very high
97.3mm
very high
97.3mm
very high
97.3mm
very high
97.3mm
very high
Mechanical Trail
89.9mm
89.9mm
89.9mm
89.9mm
89.9mm
Wheel Flop
34.4mm
34.4mm
34.4mm
34.4mm
34.4mm
Standover Height
757mm
775mm
797mm
826mm
855mm
Tire to Pedal Spindle
113.6mm
170 mm cranks
138.5mm
170 mm cranks
158.5mm
175 mm cranks
184.4mm
175 mm cranks
209.4mm
175 mm cranks
Pedal Spindle to Ground Clearance
154.2mm
170 mm cranks
154.2mm
170 mm cranks
149.2mm
175 mm cranks
149.2mm
175 mm cranks
149.2mm
175 mm cranks

27.5+ 140mm Front Suspension Build

XS
SM
MD
LG
XL
Wheel Size
650B/27.5
584 mm BSD
650B/27.5
584 mm BSD
650B/27.5
584 mm BSD
650B/27.5
584 mm BSD
650B/27.5
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
1807.4mm
1832.4mm
1857.4mm
1883.4mm
1908.4mm
Crank Length
170mm
175mm
175mm
175mm
Handlebar Width
750mm
800mm
800mm
800mm
Stem Length
70mm
70mm
70mm
80mm
Stem Angle
7deg
7deg
7deg
7deg

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
Category Trend
Hardtail Trail MTB
Source:https://surlybikes.com/bikes/karate_monkey