2024 Niner Bikes SIR 9 Frameset (29" wheels) Medium
Build
700C/29 in × 2.4 in
Insights
Average stack and reach vs trend of hardtail cross-country mtb bikes
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 620mm |
| Reach | 425mm |
| Stack to Reach Ratio | 1.46:1 |
| Seat Tube Length, C-T | 421mm |
| Top Tube Length, Effective/Horizontal Center | 603mm |
| Top Tube Slope | 21.7deg |
| Head Tube Angle | 68deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 110mm |
| Bottom Bracket Drop | 52mm |
| Bottom Bracket Height | 320mm |
| Chainstay Length | 430mm |
| Chainstay Length Horizontal | 426.8mm |
| Front-Center | 711.1mm |
| Front-Center Horizontal | 709.2mm |
| Wheelbase | 1136mm |
| Fork Offset/Rake | 44mm |
| Trail | 102.8mm very high |
| Mechanical Trail | 95.3mm |
| Wheel Flop | 35.7mm |
| Standover Height | 739mm |
| Tire to Pedal Spindle Distance With 175 mm cranks | 164.1mm |
| Pedal Spindle to Ground Clearance With 175 mm cranks | 145mm |
Frameset (29" wheels) Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 2.4in |
| Tire Outer Diameter | 743.9mm |
| Bike Length with Tires | 1879.9mm |
| Crank Length | 175mm |
| Handlebar Width | 780mm |
| Stem Length | 40mm |
| Suspension Type | Hardtail (Front suspension) |
| Bar Type | Flat Bar |
| Fork Travel | 120mm |
| Suspension Sag | 20% |
| Frame Material | Steel |
| Fork Material | Unknown |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 5 ft 8 in to 6 ft 0 in |
Source:https://www.ninerbikes.com/sir-9-frames-only/