2021 Surly Bikes Krampus 120mm Fork

Design
Flat Bar, Rigid, suspension corrected
Frame
Steel
Features
Disc brake
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category

Geometry

SM
MD
LG
XL
Stack
597mm
607mm
616mm
626mm
Reach
397mm
419mm
442mm
464mm
Stack to Reach Ratio
1.5:1
1.45:1
1.39:1
1.35:1
Seat Tube Length, C-T
368mm
419mm
470mm
521mm
Top Tube Length, Effective/Horizontal HT Top
585mm
610mm
635mm
660mm
Top Tube Length, Actual C-C
556.8mm
573mm
595.1mm
621.8mm
Top Tube Slope
25.9deg
20.8deg
16.1deg
11.8deg
Head Tube Angle
68.4deg
68.4deg
68.4deg
68.4deg
Seat Tube Angle
72.4deg
72.4deg
72.4deg
72.4deg
Head Tube Length
90mm
100mm
110mm
120mm
Bottom Bracket Drop
60mm
60mm
60mm
60mm
Bottom Bracket Height
317mm
317mm
317mm
317mm
Chainstay Length
435mm
435mm
435mm
435mm
Chainstay Length Horizontal
430.8mm
430.8mm
430.8mm
430.8mm
Front-Center
667.9mm
692.8mm
718.7mm
744.6mm
Front-Center Horizontal
665.2mm
690.2mm
716.2mm
742.2mm
Wheelbase
1096mm
1121mm
1147mm
1173mm
Fork Offset/Rake
51mm
51mm
51mm
51mm
Fork Length (Axle-To-Crown)
498mm
498mm
498mm
498mm
Trail
94.4mm
very high
94.4mm
very high
94.4mm
very high
94.4mm
very high
Mechanical Trail
87.8mm
87.8mm
87.8mm
87.8mm
Wheel Flop
32.3mm
32.3mm
32.3mm
32.3mm
Standover Height
776mm
803mm
832mm
861mm
Tire to Pedal Spindle
120.8mm
170 mm cranks
140.7mm
175 mm cranks
166.6mm
175 mm cranks
192.5mm
175 mm cranks
Pedal Spindle to Ground Clearance
147mm
170 mm cranks
142mm
175 mm cranks
142mm
175 mm cranks
142mm
175 mm cranks

120mm Fork Build

SM
MD
LG
XL
Wheel Size
700C/29"
622 mm BSD
700C/29"
622 mm BSD
700C/29"
622 mm BSD
700C/29"
622 mm BSD
Tire Width
2.6in
2.6in
2.6in
2.6in
Tire Width Max
3in
3in
3in
3in
Tire Outer Diameter
754.1mm
754.1mm
754.1mm
754.1mm
Bike Length with Tires
1850.1mm
1875.1mm
1901.1mm
1927.1mm
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/krampus