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Home > Frames
Niner SIR 9 Frame
Part Number 17
Niner SIR 9 Frame
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$849.00
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Yes we’ve heard, STEEL IS REAL! We’re on it. Niner introduces the multipurpose s.i.r. 9, a Reynolds 853 frame that can be run as a single speed using Niner’s own super light EBB, or a speeded bike with a replaceable derailleur hanger. Once again, Niner’s attention to detail can be seen on every aspect of this frame, from the custom made “Breezer” style drop outs that accommodate both a derailleur hanger or a single speed insert for a perfectly clean look, to the custom butted and built Reynolds 853 main triangle with size specific tubing, to the clean welds, 110 gram EBB, custom drawn S-bend chainstays and seatstays, stainless steel head badge, and finally the finished off quality of a reamed and faced head tube, seat tube and EBB shell, the s.i.r. 9 is the perfect do everything cross country Niner machine. The s.i.r. 9 has also received the proven Niner philosophy of geometry.

It’s no secret that Reynolds 853 is still the leading tubeset of the die hard steel world, so when we started designing the s.i.r. 9, we went directly to Reynolds UK and worked with them closely to make sure the tubesets we used for the s.i.r. 9 were perfect in every way. The small and medium have a smaller top tube and down tube, while the large and extra large have larger diameter top and down tubes for the added load of the larger riders. In addition, the tubesets were custom drawn and butted for the added length needed in these tubsets. Every tube was hand picked, prototyped and tested in both real world conditions and the brutal, run it till it breaks, laboratory. No stone was left unturned. We took what we’ve learned through the development of the One 9 and applied it to the s.i.r. 9, and we hope the effort shows.

If steel is what you’re looking for, then look no further. The Niner s.i.r. 9combines light weight steel and Niner’s uncompromising dedication to 29” wheels, and rolls them into a fast, fun, comfy ride.