2011 v2.0 Niner Bikes AIR 9 Base
- Category
- Hardtail Cross-country MTB
- Design
- Flat Bar, Hardtail (Front suspension)
- Frame
- Aluminum
- Suspension
- 100mm fork travel
- Features
- Disc brake
Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Average stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat upright stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry | Somewhat upright stack and reachvs category Suspension sag unknown Geometry may mis-represent actual riding geometry |
Geometry
Small | Medium | Large | X Large | |
Stack | 608mm | 617mm | 631mm | 651mm |
Reach | 404mm | 418mm | 433mm | 446mm |
Stack to Reach Ratio | 1.5:1 | 1.48:1 | 1.46:1 | 1.46:1 |
Seat Tube Length, Unknown | 394mm | 419mm | 483mm | 533mm |
Top Tube Length, Effective/Horizontal Unknown | 590mm | 607mm | 626mm | 645mm |
Top Tube Slope | 24deg | 21.8deg | 16.4deg | 13.2deg |
Head Tube Angle | 71deg | 71deg | 71deg | 71deg |
Seat Tube Angle | 73deg | 73deg | 73deg | 73deg |
Head Tube Length | 105mm | 110mm | 125mm | 145mm |
Bottom Bracket Drop | 54mm | 54mm | 54mm | 54mm |
Bottom Bracket Height | 318mm | 318mm | 318mm | 318mm |
Chainstay Length | 439mm | 439mm | 439mm | 439mm |
Chainstay Length Horizontal | 435.7mm | 435.7mm | 435.7mm | 435.7mm |
Front-Center | 655mm | 660mm | 680mm | 700mm |
Front-Center Horizontal | 652.3mm | 658.3mm | 678.3mm | 698.3mm |
Wheelbase | 1088mm | 1094mm | 1114mm | 1134mm |
Fork Offset/Rake | 44mm | 44mm | 44mm | 44mm |
Trail | 81.5mm very high | 81.5mm very high | 81.5mm very high | 81.5mm very high |
Mechanical Trail | 77.1mm | 77.1mm | 77.1mm | 77.1mm |
Wheel Flop | 25.1mm | 25.1mm | 25.1mm | 25.1mm |
Standover Height | 724mm | 744mm | 796mm | 837mm |
Tire to Pedal Spindle | 113mm 170 mm cranks | 118mm 170 mm cranks | 138mm 170 mm cranks | 158mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 148mm 170 mm cranks | 148mm 170 mm cranks | 148mm 170 mm cranks | 148mm 170 mm cranks |
Base Build
Small | Medium | Large | X Large | |
Wheel Size | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD | 700C/29 in 622 mm BSD |
Tire Width | 2.4in | 2.4in | 2.4in | 2.4in |
Tire Width Max | 2.4in | 2.4in | 2.4in | 2.4in |
Tire Outer Diameter | 743.9mm | 743.9mm | 743.9mm | 743.9mm |
Bike Length with Tires | 1831.9mm | 1837.9mm | 1857.9mm | 1877.9mm |
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 ScaleCategory Trend
Hardtail Cross-country MTBSource:Niner encyclopedia