2019 Niner Bikes AIR 9 2-Star NX Eagle - 27.5+

Design
Flat Bar, Hardtail (Front suspension)
Frame
Aluminum
Suspension
120mm fork travel
Features
Disc brake, Single-speed capable
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
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

Geometry

XS
SM
MD
LG
XL
Stack
610mm
610mm
620mm
634mm
652mm
Reach
395mm
410mm
425mm
445mm
465mm
Stack to Reach Ratio
1.54:1
1.49:1
1.46:1
1.42:1
1.4:1
Seat Tube Length, C-T
356mm
394mm
419mm
483mm
533mm
Top Tube Length, Effective/Horizontal HT Top
570mm
585mm
603mm
627mm
652mm
Top Tube Slope
28.5deg
24deg
21.9deg
16.4deg
12.9deg
Head Tube Angle
68deg
68deg
68deg
68deg
68deg
Seat Tube Angle
74deg
74deg
74deg
74deg
74deg
Head Tube Length
100mm
100mm
110mm
125mm
145mm
Bottom Bracket Drop
52mm
52mm
52mm
52mm
52mm
Bottom Bracket Height
311.1mm
311.1mm
311.1mm
311.1mm
311.1mm
Chainstay Length
430mm
430mm
430mm
430mm
430mm
Chainstay Length Horizontal
426.8mm
426.8mm
426.8mm
426.8mm
426.8mm
Front-Center
678mm
693mm
711mm
737mm
764mm
Front-Center Horizontal
675.2mm
690.2mm
709.2mm
735.2mm
762.2mm
Wheelbase
1102mm
1117mm
1136mm
1162mm
1189mm
Fork Offset/Rake
50.7mm
50.7mm
50.7mm
51mm
50.8mm
Trail
92mm
very high
92mm
very high
92mm
very high
91.7mm
very high
92mm
very high
Mechanical Trail
85.3mm
85.3mm
85.3mm
85mm
85.3mm
Wheel Flop
32mm
32mm
32mm
31.9mm
31.9mm
Standover Height
698mm
729mm
748mm
800mm
841mm
Tire to Pedal Spindle
144.9mm
170 mm cranks
159.9mm
170 mm cranks
177.9mm
170 mm cranks
203.9mm
170 mm cranks
230.9mm
170 mm cranks
Pedal Spindle to Ground Clearance
141.1mm
170 mm cranks
141.1mm
170 mm cranks
141.1mm
170 mm cranks
141.1mm
170 mm cranks
141.1mm
170 mm cranks

2-Star NX Eagle - 27.5+ Build

XS
SM
MD
LG
XL
Wheel Size
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
Tire Width
2.8in
2.8in
2.8in
2.8in
2.8in
Tire Width Max
3in
3in
3in
3in
3in
Tire Outer Diameter
726.2mm
726.2mm
726.2mm
726.2mm
726.2mm
Bike Length with Tires
1828.2mm
1843.2mm
1862.2mm
1888.2mm
1915.2mm
Handlebar Width
780mm
780mm
780mm
780mm
780mm
Stem Length
40mm
40mm
40mm
40mm
40mm

Published Sizing Recommendations

Height
5 ft 0 in
to
5 ft 5 in
5 ft 3 in
to
5 ft 9 in
5 ft 8 in
to
6 ft 0 in
5 ft 11 in
to
6 ft 3 in
6 ft 3 in
to
6 ft 7 in

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 Scale
Category Trend
Hardtail Trail MTB
Source:https://ninerbikes.com/products/air-9?variant=18631409533026