Niner SIR 9 Frame Only

Niner SIR 9 Frame Only
Slate Blue/Orange
Please select options


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 time without linkages and complicated shock settings. A time where all the energy you put into the pedals moves you forward. The PF30 bottom bracket allows you to run a standard press fit bottom bracket or, if simplicity is your thing, throw in an eccentric bottom bracket and run singlespeed. A hidden plate inside the chainstay yoke stiffens and strengthens in order to improve power transfer, and 18 mounting points allow you to pack it full of the things you need for a long weekend of mountain bike adventure.


Frame Niner SIR 9, Reynolds 853 steel
Headset 1.125" X 1.5" Tapered Zero Stack Head Tube, 44mm Upper, 56mm Lower, Cane Creek Description: ZS44/28.6 ZS56/40
Axles 148 x 12mm
Bottom Bracket 73mm PF30
Fork Compatibility up to 120mm travel, 51mm offset
Wheel Compatibility 29-inch, 27.5-inch

* Subject to change without notice.

Part Numbers

Option MPN
Slate Blue/Orange / Small 01-101-17-03-26
Slate Blue/Orange / Medium 01-101-17-04-26
Slate Blue/Orange / Large 01-101-17-05-26
Slate Blue/Orange / X-Large 01-101-17-06-26