Niner AIR 9 RDO 4-STAR Shimano XT

Name: Niner AIR 9 RDO 4-STAR Shimano XT
Brand: Niner

2021 MountainCross-country Manufacturer page

Last known price: $4,900

Prices shown first for United States
Fork travel: 100 mm
Wheels: 29″
Drivetrain: 1 × 12 32t / 10–51t
Gear range: 510%
Weight: 10.21 kg 22.5 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 156–166
SM 163–174
MD 171–182
LG 179–189
XL 185–195

Components

18 of 19 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

NINER RDO CARBON FIBER, INTERNAL CABLE ROUTING, PF30 BB, SINGLE-SPEED COMPATIBLE. Not identified

Suspension

2 parts

Fork
- Fox 32
Rear shock

None

Drivetrain

7 parts

Bottom bracket
- Race Face
Cassette
- Shimano Deore XT CS-M8100 12 speeds 10–51t
CS-M8100
Chain
- Shimano Deore XT CN-M8100
CN-M8100
Crankset
- Race Face 32t
Front derailleur

None
Rear derailleur
- Shimano Deore XT RD-M8100-SGS 12 speeds
RD-M8100-SGS
Shifters
- Shimano Deore XT SL-M8100
SL-M8100

Brakes

3 parts

Wheels and tires

2 parts

Cockpit and contact points

6 parts

Sizes and geometry

5 sizes

Enter your height to highlight matching ranges.

Size Reported by the manufacturer

Geometry not published

The manufacturer lists these sizes without frame measurements, so there is no drawing or geometry table.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Bicycle weight: 10.21 kg

22.5 lb

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 18.2 in
Highest gear: 92.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: PF30
Fork spring: Air
Tire clearance: Maximum tire width: 2.4″
Tire width: 2.35″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

4 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

100 mm

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,256 bicycles with this information
Coverage: 91.6% of the class

Lowest gear

18.2 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,101 bicycles with this information
Coverage: 80.3% of the class

Highest gear

92.8 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,101 bicycles with this information
Coverage: 80.3% of the class

Shifting

Mechanical

89 of 1,368 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,368 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.0 km/h
Highest gear: 35.5 km/h

Total gear range 510%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 18.2–92.8 gear inches
Class reference (p10–p90): 17.4–100.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2021
Lowest gear: 1101 bicycles with this information, 80.3% of the class
Highest gear: 1101 bicycles with this information, 80.3% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2021 builds
Specification	This bicycle Niner AIR 9 RDO 4-STAR Shimano XT	Niner AIR 9 2-STAR SRAM SX Eagle	Niner AIR 9 3-STAR Singlespeed Shimano SLX	Niner AIR 9 RDO 2-STAR SRAM SX Eagle	Niner AIR 9 RDO 3-STAR Singlespeed Shimano SLX	Niner AIR 9 RDO 3-STAR SRAM GX Eagle
Frame
Frame material	Carbon	Aluminum	Aluminum	Carbon	Carbon	Carbon
Bicycle weight	10.21 kg	11.29 kg	9.48 kg	Not informed	Not informed	Not informed
Suspension
Front travel	100 mm	120 mm	120 mm	100 mm	100 mm	100 mm
Drivetrain
Rear sprockets	12	12	1	12	1	12
Smallest sprocket	10	11	20	11	20	10
Largest sprocket	51	50	20	50	20	52
Lowest gear	18.2 in	18.6 in	46.4 in	18.6 in	46.4 in	17.9 in
Highest gear	92.8 in	84.4 in	46.4 in	84.4 in	46.4 in	92.8 in
Cockpit
Shifting	Mechanical	Mechanical	No shifting	Mechanical	No shifting	Mechanical
Other specifications
Bottom bracket standard	PF30	PF30	Not informed	PF30	PF30	PF30
Tire width	2.35″	2.6″	2.6″	2.35″	2.35″	2.35″