Skip to main content

Niner SIR 9 3-Star

Niner SIR 9 3-Star
Please select options


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.

Expect the best from our fan-favorite 3-Star SRAM GX Eagle kit. Mated to the SIR 9 frame and FOX 34 Float Factory suspension, every feature of this adventure-seeking singletrack slayer is fully optimized.

- DT Swiss M 1900 SPLINE wheels
- FOX 34 SC Float Factory EVOL FIT4, 3 position, 120mm, 110X15mm, 44mm offset
- 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 SC Float Factory EVOL Fit4, 3 Position w/Adj, Kashima Coat, 120mm, 110x15mm, 44mm Offset
Wheels Front: DT Swiss M 1900 Spline 30, Center Lock, 110x15mm
Rear: DT Swiss M 1900 Spline 30, Center Lock 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 SRAM DUB PF30
Crankset SRAM Descendant 7K Eagle DUB, 32T
Shifters SRAM GX Eagle 12 sp
Rear Derailleur SRAM GX Eagle 12 sp
Cassette/Freewheel SRAM Eagle XG 1275, 10-52T
Chain SRAM GX Eagle 12 sp
Brakes SRAM G2 R
Rotors 180/160mm SRAM Centerline X
Brake Levers SRAM G2 R
Handlebars Race Face Aeffect R 780mm Wide, 20mm Rise, 35mm Clamp
Tape/Grips Niner Grrrips L/O Nylon Soft Compound
Stem Race Face Aeffect R 40mm, 35mm Clamp
Headset Niner Internal ZS SHIS Description ZS44/28.6|ZS56/40
Seatpost KS LEV Si (XS/S-100mm, M/L/XL-150mm)
Saddle Niner Custom 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 Store SKU
Cement/Black/Copper / Small 031392103208 03-139-21-03-20
Cement/Black/Copper / Medium 031392104205 03-139-21-04-20
Cement/Black/Copper / Large 031392105202 03-139-21-05-20 210000061009
Cement/Black/Copper / X-Large 031392106209 03-139-21-06-20