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Niner SIR 9 3-Star Singlespeed

Niner SIR 9 3-Star Singlespeed
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This item is not permitted to be shipped, however it can be purchased online and picked up at one of our locations at your convenience. We gladly ship applicable orders anywhere within the Continental United States. Please note that any in-store pickup items will require that the Photo ID, Credit Card used for the purchase, and Purchaser be present for verification upon pickup.


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


Frame Hand welded Reynolds 853 steel; external cable routing; integrated bottle, bag, rack and fender mounts; 12x148 thru axle
Fork Fox 34 Float Factory EVOL Fit 4, 3 Position W/Adj, Kashima Coat, 120mm, 110x44mm Offset
Wheels Front: Niner Alloy, 30mm Internal Width, 110x15mm
Rear: Niner Alloy, 30mm Internal Width, 148x12mm
Tires Front: Schwalbe Nobby Nic Evo Super Trail TLE Addix Speedgrip 2.6"
Rear: Schwalbe Nobby Nic Evo Super Trail TLE Addix Speedgrip 2.35"
Bottom Bracket Niner Biocentric 30
Crankset Shimano SLX M7000, 32T
Cassette/Freewheel Niner Cogalicious 20T
Chain SRAM 1 sp
Brakes Shimano XT M8100, Metal Pad W/Fin
Rotors 180/160 XT RT86
Brake Levers Shimano XT M8100
Handlebars Race Face Next R 800mm Wide, 20mm Rise, 35mm Clamp
Tape/Grips Niner Grrrips L/O Soft Compound
Stem Race Face Turbine R 40mm, 35mm Clamp
Headset Niner Internal ZS SHIS Description ZS44/28.6|ZS56/40
Seatpost KS LEV Si
Saddle Niner Custom TR With CrMo Rails, Embossed Niner Graphic
Pedals Sold separately
Accessories & Extras Stans No Tubes Sealant (2 x 2oz Bottles)

* Subject to change without notice.

Part Numbers

Option UPC MPN
Cement/Black/Copper / Small 031312103202 03-131-21-03-20
Cement/Black/Copper / Medium 031312104209 03-131-21-04-20
Cement/Black/Copper / Large 031312105206 03-131-21-05-20
Cement/Black/Copper / X-Large 031312106203 03-131-21-06-20