2013-2017 Niner Bikes SIR 9 Frameset (29" wheels) Medium (80mm Fork)
Build
700C/29 in × 2.35 in
Insights
Average stack and reach vs trend of hardtail trail mtb bikes
Design deviates from other sizes of Niner Bikes SIR 9
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 612mm |
| Reach | 425mm |
| Stack to Reach Ratio | 1.44:1 |
| Seat Tube Length, C-T | 419mm |
| Top Tube Length, Effective/Horizontal Center | 603mm |
| Top Tube Slope | 21.2deg |
| Head Tube Angle | 71.3deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 110mm |
| Bottom Bracket Drop | 62mm |
| Bottom Bracket Height | 308.7mm |
| Chainstay Length | 440mm |
| Chainstay Length Horizontal | 435.6mm |
| Front-Center | 658mm |
| Front-Center Horizontal | 653.4mm |
| Wheelbase | 1089mm |
| Fork Offset/Rake | 40mm |
| Trail | 83.3mm very high |
| Mechanical Trail | 78.9mm |
| Wheel Flop | 25.3mm |
| Standover Height | 728mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | 117.3mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 138.7mm |
Frameset (29" wheels) Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.35in |
| Tire Outer Diameter | 741.4mm |
| Bike Length with Tires | 1830.4mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 100mm |
| Suspension Sag | 20% |
| Frame Material | Steel |
| Fork Material | Aluminum |
| Brake Type | Disc |
| Features | Single-speed capable |
Source:https://geometrygeeks.bike/bike/niner-sir-9-v2/