Niner S.I.R. 9 29Er Mountain Bike Frame

Niner S.I.R. 9 29Er Mountain Bike Frame
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Item Number:100037588
No Longer

The S.I.R. 9 is the most versatile bike in the Niner stable, fusing the steel is real feel of Reynolds tubing with the ability to run the frame as either a geared bike or single speed. The S.I.R. 9 uses the same custom drawn Reynolds 853 tubing as the M.C.R. 9 and combines it with Niners ultra-light eccentric bottom bracket. Custom breezer style forged dropouts have a replaceable alloy derailleur hanger and come with an insert piece for running the bike as a single speed to eliminate the unnecessary derailleur hanger for a clean look.
Niners own EBB, at 100 grams, is the lightest eccentric bottom bracket on the market. In addition to being light, its extremely functional. The EBB has more swing than any other EBB, over a full link, so you will never have to hunt down a half link to get correct chain tension and vertical dropouts mean youll never have to futz with the disc brake to remove the wheel


Available items ship between 2 days to 15 days.

CBO in Central CA, has hundreds of direct fulfillment partners with the fastest possible restock delivery times in the US.

For 30 years, we have been the best at sourcing in the US, so we will find and supply many items the competition just can't deliver! Time may vary by item, and we will notify you if items are not shipped within this timeframe.

In Stock

One of our warehouses will ship this item within 3 to 48 hours, Monday - Friday.

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