Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Niner
2021 Niner SIR 9 3-Star Singlespeed
Previous used estimate
$1,408 - $1,448
Actual value depends on condition, size, and local demand.
Value Guide market data · 2021 Niner SIR 9 3-Star Singlespeed
12-month projected trend
13%
Direction and magnitude, not judgment
vs. category average
6%
Drops faster than category avg
Price over time - 2021 Niner SIR 9 3-Star Singlespeed
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All SIR model years
Overview
About this bike
The SIR 9 is a comfortable, capable, hand-built bike made from proven, air-hardened, heat-treated Reynolds 853 steel. When you're spinning up the steeps, bombing down the backcountry, and grinding out the final miles as the sun sinks into the horizon, you need a bike you can trust. Seeking simplicity, silence, and a single speed drivetrain? Look no further than our 3-Star Shimano XT single speed build. Mated to our SIR 9 frame and FOX suspension, your single-speed adventures are ready and waiting. - Niner alloy wheels, 30mm internal width - Shimano SLX cranks and Niner Cogalicious cog - KS LEV Si dropper post
Specifications
- Subtype
- Cross Country
- Category
- Mountain
- Component Fork
- Fox 34 Float Factory EVOL Fit 4, 3 Position W/Adj, Kashima Coat, 120mm, 110x44mm Offset
- Component Size
- Small, Medium, Large, X-Large
- Component Stem
- Race Face Turbine R 40mm, 35mm Clamp
- Product Family
- SIR
- Component Chain
- SRAM 1 sp
- Component Color
- Cement/Black/Copper
- Component Frame
- Hand welded Reynolds 853 steel; external cable routing; integrated bottle, bag, rack and fender mounts; 12x148 thru axle
- Component Brakes
- Shimano XT M8100, Metal Pad W/Fin
- Component Pedals
- Sold separately
- Component Rotors
- 180/160 XT RT86
- Component Saddle
- Niner Custom TR With CrMo Rails, Embossed Niner Graphic
- Component Headset
- Niner Internal ZS SHIS Description ZS44/28.6|ZS56/40
- Component Crankset
- Shimano SLX M7000, 32T
- Component Seatpost
- KS LEV Si
- Component Handlebar
- Race Face Next R 800mm Wide, 20mm Rise, 35mm Clamp
- Component Wheel Set
- Front: Niner Alloy, 30mm Internal Width, 110x15mm Rear: Niner Alloy, 30mm Internal Width, 148x12mm
- Component Front Tire
- Front: Schwalbe Nobby Nic Evo Super Trail TLE Addix Speedgrip 2.6" Rear: Schwalbe Nobby Nic Evo Super Trail TLE Addix Speedgrip 2.35"
- Component Tape Grips
- Niner Grrrips L/O Soft Compound
- Component Brake Levers
- Shimano XT M8100
- Component Bottom Bracket
- Niner Biocentric 30
- Component Accessories Extras
- Stans No Tubes Sealant (2 x 2oz Bottles)
- Component Cassette Freewheel
- Niner Cogalicious 20T
- Crankset
- Shimano SLX M7000, 32T
- Pedals
- Sold separately
- Bottom Bracket
- Niner Biocentric 30
- Chain
- SRAM 1 sp
- Seatpost
- KS LEV Si
- Saddle
- Niner Custom TR With CrMo Rails, Embossed Niner Graphic
- Handlebar
- Race Face Next R 800mm Wide, 20mm Rise, 35mm Clamp
- Headset
- Niner Internal ZS SHIS Description ZS44/28.6|ZS56/40
- Stem
- Race Face Turbine R 40mm, 35mm Clamp
- Accessories & Extras
- Stans No Tubes Sealant (2 x 2oz Bottles)
- Brake Levers
- Shimano XT M8100
- Brakes
- Shimano XT M8100, Metal Pad W/Fin
- Fork
- Fox 34 Float Factory EVOL Fit 4, 3 Position W/Adj, Kashima Coat, 120mm, 110x44mm Offset
- Frame
- Hand welded Reynolds 853 steel; external cable routing; integrated bottle, bag, rack and fender mounts; 12x148 thru axle
- Tape/Grips
- Niner Grrrips L/O Soft Compound
- Color
- Cement/Black/Copper
- Size
- X-Large
- Cassette/Freewheel
- Niner Cogalicious 20T
- Rotors
- 180/160 XT RT86
- Wheel Set
- Front: Niner Alloy, 30mm Internal Width, 110x15mm Rear: Niner Alloy, 30mm Internal Width, 148x12mm
- Front Tire
- Front: Schwalbe Nobby Nic Evo Super Trail TLE Addix Speedgrip 2.6" Rear: Schwalbe Nobby Nic Evo Super Trail TLE Addix Speedgrip 2.35"
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork and rear shock service intervals and check pivot bearings for play.