Niner SIR 9 Mountain Bike Frame

Versatile Excellence: Introducing the Niner SIR 9

The SIR 9 is the most versatile bike in the Niner stable, fusing the “steel is real” feel of a new Reynolds 853 DZB tubeset with the ability to run the frame as either a geared bike or single speed with Niner’s ultra-light eccentric bottom bracket.

The Niner Bio-Centric II bottom bracket makes adjustments easy across a wide range of gears and eliminates the need for adjustable dropouts, giving the cleanest possible solution for singlespeed use. No bolt on hubs, no chain tensioners cluttering your ride, no brake adjustments with gear changes

Post Mount Brake Bosses and Downtube Cable Guides used in the SIR 9

The new SIR 9 uses 142x12mm spacing with an included Maxle for added rear-end torsional stiffness, removable downtube cable guides, post mount brake bosses between the chain and seatstay for braking precision and of course, the Niner headbadge and three great color options for that perfect finishing touch.

Also check Ibis Mountain Bikes.