2018 Surly Bikes Lowside Base

Category
Rigid MTB
Design
Flat Bar, Rigid, suspension corrected
Frame
Steel
Fork
Steel
Features
Disc brake
Very aggressive stack and reachvs category
Very aggressive stack and reachvs category
Very aggressive stack and reachvs category
Very aggressive stack and reachvs category
Somewhat aggressive stack and reachvs category

Geometry

XS
SM
MD
LG
XL
Stack
542.2mm
560.3mm
574.4mm
588.5mm
602.5mm
Reach
414.5mm
429.3mm
445.3mm
461mm
477mm
Stack to Reach Ratio
1.31:1
1.31:1
1.29:1
1.28:1
1.26:1
Seat Tube Length, C-T
316mm
366mm
416mm
466mm
516mm
Top Tube Length, Effective/Horizontal Center
570mm
590mm
610mm
630mm
650mm
Top Tube Slope
25.4deg
21.5deg
17.3deg
13.4deg
9.8deg
Head Tube Angle
70deg
70deg
70deg
70deg
70deg
Seat Tube Angle
74deg
74deg
74deg
74deg
74deg
Head Tube Length
110mm
125mm
140mm
155mm
170mm
Bottom Bracket Drop
55mm
55mm
55mm
55mm
55mm
Bottom Bracket Height
300.7mm
300.7mm
300.7mm
300.7mm
300.7mm
Chainstay Length
425mm
425mm
425mm
425mm
425mm
Chainstay Length Horizontal
421.4mm
421.4mm
421.4mm
421.4mm
421.4mm
Front-Center
648.9mm
669.8mm
690.8mm
711.7mm
732.6mm
Front-Center Horizontal
646.6mm
667.6mm
688.6mm
709.6mm
730.6mm
Wheelbase
1068mm
1089mm
1110mm
1131mm
1152mm
Fork Offset/Rake
47mm
47mm
47mm
47mm
47mm
Fork Length (Axle-To-Crown)
420mm
420mm
420mm
420mm
420mm
Trail
79.5mm
high
79.5mm
high
79.5mm
high
79.5mm
high
79.5mm
high
Mechanical Trail
74.7mm
74.7mm
74.7mm
74.7mm
74.7mm
Wheel Flop
25.5mm
25.5mm
25.5mm
25.5mm
25.5mm
Standover Height
700mm
729mm
762mm
792mm
823mm
Tire to Pedal Spindle
123.2mm
170 mm cranks
144.1mm
170 mm cranks
165.1mm
170 mm cranks
186mm
170 mm cranks
206.9mm
170 mm cranks
Pedal Spindle to Ground Clearance
130.7mm
170 mm cranks
130.7mm
170 mm cranks
130.7mm
170 mm cranks
130.7mm
170 mm cranks
130.7mm
170 mm cranks

Base Build

XS
SM
MD
LG
XL
Wheel Size
26"
559 mm BSD
26"
559 mm BSD
26"
559 mm BSD
26"
559 mm BSD
26"
559 mm BSD
Tire Width
3in
3in
3in
3in
3in
Tire Outer Diameter
711.4mm
711.4mm
711.4mm
711.4mm
711.4mm
Bike Length with Tires
1779.4mm
1800.4mm
1821.4mm
1842.4mm
1863.4mm
Crank Length
170mm
170mm
170mm
170mm
170mm
Handlebar Width
820mm
820mm
820mm
820mm
820mm
Stem Length
60mm
60mm
60mm
60mm
60mm

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
Rigid MTB
Source:https://surlybikes.com/bikes/lowside/bike_specs