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Niner
Air 9 Carbon Mountain Bike Frame-2016

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Hard-to-beat hardtail.

Niner, in accordance with the company's name, has been on a mission for years to perfect the 29-inch-wheeled hardtail mountain bike, and with some new paint work and structural upgrades like a 12x142mm thru-axle, the 2016 Niner Air 9 Carbon frameset makes this mission quite clear.


The AIR 9 Carbon borrows heavily from Niner’s AIR 9 RDO race rocket. At the core of every Niner frame is extensive computer-based finite element analysis, and here it’s used to develop a high modulus carbon fiber structure with optimized weaves, layups, and tube shapes. The weight saving measures haven’t been taken quite as far as the featherweight RDO, but the AIR 9 Carbon is still adequately svelte. The swooping lines aren’t chosen for aesthetics, rather they’re designed to minimize chatter and guide impact forces to the stronger parts of the frame. Chain torque goes directly to the rear wheel via the oversized PF30 bottom bracket shell and shapely chainstays, while trail vibrations are damped by the swooping seatstays. Niner ties the bottom bracket to the precision-enhancing tapered head tube via a large down tube to ensure the frame tracks true and responds to every input.


Niner recommends an 80 to 100mm suspension fork, or a rigid unit with a 470mm axle to crown length and 45mm offset. Unsurprisingly, its award-winning carbon fork shares those exact dimensions. Titanium plates are incorporated gracefully into the frame to protect against chain drop and chain suck. The tapered head tube comes equipped with a Cane Creek IS42/28.6|IS52/40 integrated (Campy style) headset. You’ll need a 31.6mm seatpost and a 35mm seat clamp. The rear triangle offers clearance for tires up to 2.4 inches, although there are variances across tire manufacturers, so some of the largest 2.4s may not fit. Its chainstay-located, post-style brake mount accepts either a 160mm rotor, or a 185mm rotor with the correct adapter. The maximum chainring size is limited to a 32t middle ring. Most standard triple chainring cranksets will clear, and if you choose a more modern double, Niner recommends a combination no larger than 28/40t.


Details

  • Carbon fiber
  • Protective titanium plates
  • Included headset
  • PF30 bottom bracket
  • Tapered head tube
  • 12x142mm thru-axle
  • Requires 31.6mm seatpost and 35mm seat clamp
  • Item #NNR002A
Frame Material
carbon fiber
Suspension
front only
Head Tube Diameter
tapered (IS42/28.6 | IS52/40)
Headset Included
yes
Bottom Bracket Type
PF30
ISCG Tabs
no
Front Derailleur Mount
34.9mm high clamp
Derailleur Pull
bottom
Seatpost Diameter
31.6 mm
Rear Axle
12x142mm thru-axle
Recommended Use
cross country
Manufacturer Warranty
5 years

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