Global Bikes, Gilbert Shop, Chandler Shop, Ahwatukee Shop

Niner SIR 9 4-Star

Niner SIR 9 4-Star
Slate Blue/Orange
Please select options
Please give us a call to check current availability.


Take charge of your ride with this Reynolds 853 steel frame designed around Niner's [R]evolution trail geometry. Ride it hard. Ride it fast. After all, it's made from a truly time-tested material that's been air hardened and heat treated. The efficient, yet compliant ride quality of the SIR 9 hearkens back to a simpler time. A SRAM X01 Eagle 1x12 drivetrain and Guide RSC brakes provide wide-range gearing with ample stopping power in a lightweight combo, and a Fox 34 Float Factory 120mm fork, Stan's Arch wheelset, and a KS Lev Integra dropper seatpost create a solid platform for getting rowdy on the trail. Niner knew you'd also enjoy loading this steel steed for a weekend of bikepacking adventure so they added 18 mounting points to accommodate those needs. However you choose to use the SIR 9, its simple design will inspire a renewed desire for exploration and reward you with that comfortable ride only a high-grade steel hardtail can supply.


Frame SIR 9, Reynolds 853 steel
Fork Fox 34 Float Factory Fit4, 3 position w/adjust, Kashima Coat, 120mm
Headset Niner Internal ZS SHIS ZS44/28.6|ZS56/40
Axles Front: 110 x 15mm
Rear: 148 x 12mm
Rims/Wheels Stan's NoTubes ZTR Arch MK3
Hubs Stan's NoTubes Neo
Tires Front: Maxxis Ardent DC/EXO/TR 29 x 2.4
Rear: Maxxis Ardent DC/EXO/TR 29 x 2.25
Crankset SRAM X1 Eagle Carbon
Chainrings 32T
Bottom Bracket SRAM (PF30)
Chain SRAM X01 Eagle 12sp
Rear Derailleur SRAM X01 Eagle 12sp
Cassette/Rear Cogs SRAM Eagle XG 1295, 10-50t
Shifters SRAM X01 Eagle 12sp
Handlebars Race Face SixC, 820mm wide, 20mm rise, 35mm
Tape/Grips Niner Grips L/O Nylon Flanged
Stem Race Face Turbine Basic 50mm, 35mm Clamp
Brake Levers SRAM Guide RSC
Brakes SRAM Guide RSC, 180/160mm Centerline rotors
Saddle Niner Custom TR with CrN-Ti Rails, Printed Niner Graphic
Seat Post KS Lev Integra

* Subject to change without notice.

Part Numbers

Option MPN
Slate Blue/Orange / Small 03-149-18-03-26
Slate Blue/Orange / Medium 03-149-18-04-26
Slate Blue/Orange / Large 03-149-18-05-26
Slate Blue/Orange / X-Large 03-149-18-06-26