2004 Surly Bikes Instigator Base

Design
Flat Bar, Hardtail (Front suspension)
Frame
Steel
Features
Rim brake
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Geometry

x-small
small
medium
large
Seat Tube Length, C-T
355.6mm
406.4mm
457.2mm
508mm
Top Tube Length, Effective/Horizontal Center
558.8mm
574mm
599.4mm
624.8mm
Head Tube Angle
71deg
71deg
71deg
71deg
Seat Tube Angle
72deg
72deg
72deg
72deg
Head Tube Length
109.2mm
109.2mm
109.2mm
129.5mm
Bottom Bracket Drop
22.9mm
25.4mm
25.4mm
25.4mm
Bottom Bracket Height
325.2mm
322.7mm
322.7mm
322.7mm
Chainstay Length
424.2mm
424.2mm
424.2mm
424.2mm
Chainstay Length Horizontal
423.6mm
423.4mm
423.4mm
423.4mm
Trail
Mechanical Trail
Wheel Flop
Standover Height
711.2mm
736.6mm
772.2mm
812.8mm
Pedal Spindle to Ground Clearance
155.2mm
170 mm cranks
152.7mm
170 mm cranks
152.7mm
170 mm cranks
152.7mm
170 mm cranks

Base Build

x-small
small
medium
large
Wheel Size
26 in
559 mm BSD
26 in
559 mm BSD
26 in
559 mm BSD
26 in
559 mm BSD
Tire Width
2.7in
2.7in
2.7in
2.7in
Tire Outer Diameter
696.2mm
696.2mm
696.2mm
696.2mm
Source:https://surlybikes.com/uploads/downloads/SURLYInstigator.pdf