Niner SIR 9 2-STAR SRAM SX Eagle

Name: Niner SIR 9 2-STAR SRAM SX Eagle
Brand: Niner

2021 MountainTrail Manufacturer page

Niner SIR 9 2-STAR SRAM SX Eagle, color Cement Grey / Black

Last known price: $2,550

Prices shown first for United States
Fork travel: 120 mm
Wheels: 29″
Drivetrain: 1 × 12 32t / 11–50t
Gear range: 455%
Weight: 13.06 kg 28.8 lb · Reference configuration not specified
Frame: Steel
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

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

HAND WELDED REYNOLDS 853 STEEL; EXTERNAL CABLE ROUTING; INTEGRATED BOTTLE, BAG, RACK AND FENDER MOUNTS; 12X148 THRU AXLE Not identified

Suspension

2 parts

Fork
- Marzocchi
Rear shock

None

Drivetrain

7 parts

Brakes

3 parts

Wheels and tires

2 parts

Cockpit and contact points

6 parts

Sizes and geometry

4 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: Steel
Bicycle weight: 13.06 kg

28.8 lb

Suspension

Suspension configuration: Hardtail
Front travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 18.6 in
Highest gear: 84.4 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: 2.35″
Tire width: 2.6″
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

120 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,324 bicycles with this information
Coverage: 98.1% of the class

Lowest gear

18.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,137 bicycles with this information
Coverage: 84.2% of the class

Highest gear

84.4 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,137 bicycles with this information
Coverage: 84.2% of the class

Shifting

Mechanical

53 of 1,346 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,346 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.1 km/h
Highest gear: 32.3 km/h

Total gear range 455%

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: 18.6–84.4 gear inches
Class reference (p10–p90): 16.9–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2021
Lowest gear: 1137 bicycles with this information, 84.2% of the class
Highest gear: 1137 bicycles with this information, 84.2% 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 SIR 9 2-STAR SRAM SX Eagle	Niner SIR 9 3-STAR Singlespeed Shimano SLX	Niner SIR 9 3-STAR SRAM GX Eagle	Niner SIR 9 4-STAR Shimano XT	Niner SIR 9 5-STAR SRAM X01 Eagle
Frame
Bicycle weight	13.06 kg	13.06 kg	Not informed	12.56 kg	Not informed
Drivetrain
Rear sprockets	12	1	12	12	12
Smallest sprocket	11	20	10	10	10
Largest sprocket	50	20	52	51	52
Lowest gear	18.6 in	46.4 in	17.9 in	18.2 in	17.9 in
Highest gear	84.4 in	46.4 in	92.8 in	92.8 in	92.8 in
Cockpit
Seatpost	Rigid seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost
Shifting	Mechanical	No shifting	Mechanical	Mechanical	Mechanical
Other specifications
Bottom bracket standard	PF30	Not informed	PF30	PF30	PF30
Wheel material	Aluminum	Aluminum	Aluminum	Aluminum	Carbon

Changes since 2020
Specification	2020 Niner SIR 9 - 2-STAR SRAM SX Eagle	This bicycle Niner SIR 9 2-STAR SRAM SX Eagle
Cockpit
Seatpost	Dropper seatpost	Rigid seatpost
Other specifications
Tire clearance	Maximum tire width: 2.4″	Maximum tire width: 2.35″
Tire width	2.5″	2.6″
Wheel size	27.5″ / 29″	29″