2018 Surly Bikes Instigator 2.0 Base

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

Geometry

xSmall (13)
Small (15)
Medium (17)
Large (19)
xLarge (21)
Stack
584.5mm
584.5mm
584.5mm
598.3mm
598.3mm
Reach
377.9mm
402.9mm
422.9mm
443.7mm
463.7mm
Stack to Reach Ratio
1.55:1
1.45:1
1.38:1
1.35:1
1.29:1
Seat Tube Length, Unknown
298.6mm
376.4mm
427.2mm
478mm
528.8mm
Top Tube Length, Effective/Horizontal HT Top
555mm
580mm
605mm
625mm
645mm
Top Tube Length, Actual C-C
552.8mm
570.8mm
584.7mm
601.1mm
621.6mm
Top Tube Slope
32.7deg
23.6deg
17.8deg
13.6deg
8.5deg
Head Tube Angle
67.5deg
67.5deg
67.5deg
67.5deg
67.5deg
Seat Tube Angle
73deg
73deg
73deg
73deg
73deg
Head Tube Length
100mm
100mm
100mm
115mm
115mm
Bottom Bracket Drop
30mm
30mm
30mm
30mm
30mm
Bottom Bracket Height
319.4mm
319.4mm
319.4mm
319.4mm
319.4mm
Chainstay Length
416.4mm
416.4mm
416.4mm
416.4mm
416.4mm
Chainstay Length Horizontal
415.3mm
415.3mm
415.3mm
415.3mm
415.3mm
Front-Center
655.9mm
680.8mm
705.8mm
727.3mm
747.3mm
Front-Center Horizontal
655.2mm
680.2mm
705.2mm
726.7mm
746.7mm
Wheelbase
1070.5mm
1095.5mm
1120.5mm
1142mm
1162mm
Fork Offset/Rake
44mm
44mm
44mm
44mm
44mm
Fork Length (Axle-To-Crown)
508.3mm
508.3mm
508.3mm
508.3mm
508.3mm
Trail
97.1mm
very high
97.1mm
very high
97.1mm
very high
97.1mm
very high
97.1mm
very high
Mechanical Trail
89.7mm
89.7mm
89.7mm
89.7mm
89.7mm
Wheel Flop
34.3mm
34.3mm
34.3mm
34.3mm
34.3mm
Standover Height
738.7mm
745.2mm
771.6mm
796.7mm
827.7mm
Tire to Pedal Spindle
136.5mm
170 mm cranks
161.5mm
170 mm cranks
186.5mm
170 mm cranks
208mm
170 mm cranks
227.9mm
170 mm cranks
Pedal Spindle to Ground Clearance
149.4mm
170 mm cranks
149.4mm
170 mm cranks
149.4mm
170 mm cranks
149.4mm
170 mm cranks
149.4mm
170 mm cranks

Base Build

xSmall (13)
Small (15)
Medium (17)
Large (19)
xLarge (21)
Wheel Size
26 in
559 mm BSD
26 in
559 mm BSD
26 in
559 mm BSD
26 in
559 mm BSD
26 in
559 mm BSD
Tire Width
2.75in
2.75in
2.75in
2.75in
2.75in
Tire Outer Diameter
698.7mm
698.7mm
698.7mm
698.7mm
698.7mm
Bike Length with Tires
1769.2mm
1794.2mm
1819.2mm
1840.7mm
1860.7mm

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/instigator_2point0-frame/geometry