Niner SIR 9 2-Star GX1 - 2016

Niner SIR 9 2-Star GX1
  • Color: Blaze Yellow
  • Price is for bicycle as defined in specifications.
This item is currently not available.


Niner’s SIR 9 is a savvy reminder why every great bicycle comes down to three things: good ideas, good workmanship, and good materials. The SIR 9 combines these qualities in a soulful ride that ensures every ride is a great day on your mountain bike. Niner worked with Reynolds to produce a 853 DZB (Double-Zone Butting) steel tubeset that uses multiple wall thicknesses and a Niner-specific down tube bend to maximize strength and torsional rigidity at the head tube-down tube intersection while maintaining adequate clearance between the down tube and front tire, a tricky balance for 29ers often requiring the addition of gussets (and weight). Niner’s Biocentric II eccentric bottom bracket offers a dramatic range of adjustability and allows for clean, rock-solid single-speed setups, manual multi-gear swaps without chain length or brake adjustments, and bottom bracket position adjustability for fine-tuning your geometry. The tapered head tube is stiff and strong to keep the front end tracking true when the trail throws everything it has at you. The rear through-axle provides great power transfer and responsive handling.

The SIR 9 2-Star GX1 will fast become your always-reliable, ready-for-anything trail rig. RockShox has you covered with a Reba RL Solo Air fork that makes silk ribbon of rock-strewn trails. SRAM’s GX1 drivetrain puts a wide range of intelligently-spaced gears at your fingertips, giving you the range you need in a streamlined 1 x 11-speed package that keeps your legs pumping at the sweet spot. Legendary Maxxis Ikon traction keeps you pinned through berms, while powerful SRAM DB5 brakes offer controlled modulation so you can scrub speed into that next switchback.


Frame Reynolds 853 DZB w/142 x 12mm through-axle
Fork RockShox Reba RL Solo Air, 100mm-travel, 110 x 15mm axle
Rims/Wheels Niner Alloy
Hubs see Rims/Wheels
Spokes See Rims/Wheels
Tires Maxxis Ikon SC F: 29 x 2.35, R: 29 x 2.20
Crankset SRAM S1000
Chainrings 32T
Rear Derailleur SRAM GX1
Rear Cogs Shimano XT M8000, 11-speed: 11-42
Handlebars Niner Flat Top, aluminum
Tape/Grips Niner Grrrips
Stem Niner, aluminum
Brake Levers SRAM DB5
Brakes SRAM DB5 180/160mm rotors
Saddle Niner Custom, chromoly rails
Seat Post Niner aluminum, 400mm

* Subject to change without notice.

Part Numbers

Option UPC MPN
Blaze Yellow / Small 031511603558 03-151-16-03-55
Blaze Yellow / Medium 031511604555 03-151-16-04-55
Blaze Yellow / Large 031511605552 03-151-16-05-55
Blaze Yellow / X-Large 031511606559 03-151-16-06-55
Arctic White / Small 031511603305 03-151-16-03-30
Arctic White / Medium 031511604302 03-151-16-04-30
Arctic White / Large 031511605309 03-151-16-05-30
Arctic White / X-Large 031511606306 03-151-16-06-30