2018 Surly Bikes Instigator 2.0 Base Medium (17)
Build
26 in × 2.75 in
Insights
Somewhat aggressive stack and reach vs trend of hardtail trail mtb bikes
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Stack and Reach vs. Category Trend
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Geometry
| Stack | 584.5mm |
| Reach | 422.9mm |
| Stack to Reach Ratio | 1.38:1 |
| Seat Tube Length, Unknown | 427.2mm |
| Top Tube Length, Effective/Horizontal HT Top | 605mm |
| Top Tube Length, Actual C-C | 584.7mm |
| Top Tube Slope | 17.8deg |
| Head Tube Angle | 67.5deg |
| Seat Tube Angle | 73deg |
| Head Tube Length | 100mm |
| Bottom Bracket Drop | 30mm |
| Bottom Bracket Height | 319.4mm |
| Chainstay Length | 416.4mm |
| Chainstay Length Horizontal | 415.3mm |
| Front-Center | 705.8mm |
| Front-Center Horizontal | 705.2mm |
| Wheelbase | 1120.5mm |
| Fork Offset/Rake | 44mm |
| Fork Length (Axle-To-Crown) | 508.3mm |
| Trail | 97.1mm very high |
| Mechanical Trail | 89.7mm |
| Wheel Flop | 34.3mm |
| Standover Height | 771.6mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 186.5mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 149.4mm |
Base Build
| Wheel Size | 26 inch (559mm BSD) |
| Tire Width | 2.75in |
| Tire Outer Diameter | 698.7mm |
| Bike Length with Tires | 1819.2mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 140mm |
| Suspension Sag | Unknown |
| Frame Material | Steel |
| Fork Material | Unknown |
| Brake Type | Disc |
Source:https://surlybikes.com/bikes/instigator_2point0-frame/geometry