Niner SIR 9 29er Frame

Versatility is the name of the game with the SIR 9 from Niner Bikes. Run it singlespeed or with gears. Niner's SIR 9 proves that Steel Is Real.

This Reynolds 853 frame is custom butted with size specific tubing, super clean welds, and custom drawn S-bend chainstays and seatstays. This frame is ultra versatile, build it as a single speed with Niner's new Bio-Centric EBB or add gears with a replaceable derailleur hanger.

• Special drive-side drop out insert gives a clean look when riding the one gear set-up
  
• Custom S-bend stays give excellent heel and mud clearance, and will accomodate a 2.4" tire
  
• 28.6 front derailleur clamp size. Niner recommends that the EBB is set in the forwardmost position if using a front derailleur
• Requires a 27.2 seatpost, 400mm minimum length
• 30mm seatpost clamp not included