2019 Surly Bikes Karate Monkey 27.5+ 140mm Front Suspension

Design
Flat Bar, Hardtail (Front suspension)
Frame
Steel
Suspension
140mm fork travel, 0% sag
Features
Disc brake
Somewhat upright stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category

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
521mm
Top Tube Length, Effective/Horizontal HT Top
565mm
590mm
615mm
640mm
665mm
Top Tube Length, Actual C-C
549.7mm
560.4mm
575mm
597.5mm
624.5mm
Top Tube Slope
32.3deg
27.1deg
21.1deg
16.4deg
12.1deg
Head Tube Angle
67.5deg
67.5deg
67.5deg
67.5deg
67.5deg
Seat Tube Angle
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
330.5mm
330.5mm
330.5mm
330.5mm
330.5mm
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 (Axle-To-Crown)
521mm
521mm
521mm
521mm
521mm
Trail
99.9mm
very high
99.9mm
very high
99.9mm
very high
99.9mm
very high
99.9mm
very high
Mechanical Trail
92.3mm
92.3mm
92.3mm
92.3mm
92.3mm
Wheel Flop
35.3mm
35.3mm
35.3mm
35.3mm
35.3mm
Standover Height
757mm
775mm
797mm
826mm
855mm
Tire to Pedal Spindle
112.3mm
165 mm cranks
132.2mm
170 mm cranks
152.2mm
175 mm cranks
178.1mm
175 mm cranks
203.1mm
175 mm cranks
Pedal Spindle to Ground Clearance
165.5mm
165 mm cranks
160.5mm
170 mm cranks
155.5mm
175 mm cranks
155.5mm
175 mm cranks
155.5mm
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 Outer Diameter
749mm
749mm
749mm
749mm
749mm
Bike Length with Tires
1820mm
1845mm
1870mm
1896mm
1921mm
Crank Length
165mm
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

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#geo-140mm-suspension-fork-2