2019 Surly Bikes Lowside 27.5+ Suspension Fork

Design
Flat Bar, Hardtail (Front suspension)
Frame
Steel
Fork
Steel, 100mm travel, 25% sag
Features
Disc brake, Single-speed capable
Very aggressive stack and reachvs category
Somewhat aggressive stack and reachvs category
Somewhat aggressive stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category

Geometry

XS
SM
MD
LG
XL
Stack
564.5mm
579.8mm
593.5mm
608mm
622mm
Reach
388mm
403.7mm
419.5mm
435.5mm
451mm
Stack to Reach Ratio
1.45:1
1.44:1
1.41:1
1.4:1
1.38:1
Seat Tube Length, C-T
316mm
366mm
416mm
466mm
516mm
Top Tube Length, Effective/Horizontal HT Top
578mm
598mm
618mm
638mm
658mm
Top Tube Length, Actual C-C
562.4mm
575.6mm
589.7mm
608.5mm
630.4mm
Top Tube Slope
28.5deg
24.1deg
19.8deg
15.9deg
12.2deg
Head Tube Angle
67.3deg
67.4deg
67.5deg
67.5deg
67.6deg
Seat Tube Angle
71.4deg
71.4deg
71.5deg
71.5deg
71.6deg
Head Tube Length
110mm
125mm
140mm
155mm
170mm
Bottom Bracket Drop
35.6mm
36mm
36.4mm
36.7mm
37mm
Bottom Bracket Height
327.5mm
327.1mm
326.7mm
326.4mm
326.1mm
Chainstay Length
425mm
425mm
425mm
425mm
425mm
Chainstay Length Horizontal
423.5mm
423.5mm
423.4mm
423.4mm
423.4mm
Front-Center
654.5mm
675.5mm
697mm
718mm
739mm
Front-Center Horizontal
653.5mm
674.5mm
696.1mm
717.1mm
738.1mm
Wheelbase
1077mm
1098mm
1119.5mm
1140.5mm
1161.5mm
Fork Offset/Rake
42mm
42mm
42mm
42mm
42mm
Fork Length (Axle-To-Crown)
468mm
468mm
468mm
468mm
468mm
Trail
106.4mm
very high
105.7mm
very high
105mm
very high
105mm
very high
104.2mm
very high
Mechanical Trail
98.1mm
97.6mm
97mm
97mm
96.4mm
Wheel Flop
37.9mm
37.5mm
37.1mm
37.1mm
36.7mm
Standover Height
729mm
755mm
787mm
817mm
848.5mm
Tire to Pedal Spindle
121.3mm
170 mm cranks
142.4mm
170 mm cranks
158.9mm
175 mm cranks
179.9mm
175 mm cranks
200.9mm
175 mm cranks
Pedal Spindle to Ground Clearance
157.5mm
170 mm cranks
157.1mm
170 mm cranks
151.7mm
175 mm cranks
151.4mm
175 mm cranks
151.1mm
175 mm cranks

27.5+ Suspension Fork 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
2.8in
2.8in
2.8in
2.8in
2.8in
Tire Width Max
2.8in
2.8in
2.8in
2.8in
2.8in
Tire Outer Diameter
726.2mm
726.2mm
726.2mm
726.2mm
726.2mm
Bike Length with Tires
1803.2mm
1824.2mm
1845.7mm
1866.7mm
1887.7mm
Crank Length
170mm
170mm
175mm
175mm
175mm
Handlebar Width
820mm
820mm
820mm
820mm
820mm
Stem Length
60mm
60mm
60mm
60mm
60mm
Stem Angle
6deg
6deg
6deg
6deg
6deg

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/lowside