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Niner
ONE 9 RDO 2-Star SS Complete Mountain Bike - 2014

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One speed race-rocket.

Whether you’re a hardened endurance racer, or you’re just looking for a way to sharpen up your skills, a rigid, singlespeed 29er will inject a whole new sense of fun into your favorite trails. But just because these machines are simple doesn’t mean they’re not advanced, as the Niner ONE 9 RDO 2-Star SS Complete Mountain Bike indisputably proves. The featherweight carbon fiber frame is paired with Niner’s own carbon fiber, thru-axle-equipped fork, which many consider the benchmark rigid mountain option. And with a lightweight, sensible build kit, it just begs to be raced. That might mean strapping on a number plate, or just dropping your buddies on the next post-work ride — that choice is up to you.


The ONE 9 RDO benefits from all of the weight saving measures that have made the AIR 9 RDO the notorious race-rocket that it is. 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 — ultimately producing the lightest Niner to date. The RDO’s fluid form is no accident, and it's designed to minimize chatter and guide impact forces to the strongest parts of the frame. Chain torque goes directly to the rear wheel via the oversized CYA bottom bracket shell and shapely chainstays, yet trail vibrations are quelled 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.


What separates the ONE 9 RDO from its AIR 9 ancestor is the use of Niner’s CYA bottom bracket interface. It’s oversized to make room for the included BioCentric eccentric bottom bracket. Unlike other EBBs, BioCentric has a track record of being easy to use and remaining creak-free, but the real benefit is that it allows for the use of a fixed rear dropout. On top of being the lightest option, it avoids the slippage that can occur with some sliding dropouts, and it’s worlds easier to use in the heat of a race than horizontal dropouts. And should you change your mind at some point and want to run gears, you can swap the bottom bracket to Niner’s fixed-position CYA insert, add a derailleur hanger, and run any of the one-by drivetrains on the market.


For a bike that obviously prizes efficiency, Niner’s choice to spec its own revered carbon fiber rigid fork is well justified. With a tapered steerer tube, and a 15mm thru-axle, it’s incredibly precise, ensuring inch-perfect steering. Niner’s components also get the nod for the smooth riding, including a carbon fiber seatpost, Flat Top alloy handlebars, aluminum stem, and the proven Cogalicious singlespeed cog. Stan’s NoTubes provides the singlespeed-specific wheelset, and they’re wrapped in Schwalbe’s fast rolling Nobby Nic tires. Stopping is handled by Avid’s Elixir 5 hydraulic disc brakes. Basically, this is a build that you can pull out of the box and race, or just ride hard to your heart’s content.


The Niner ONE 9 RDO 2-Star SS Complete Mountain Bike is available in four sizes, from Small to X-Large, and in the color Atomic Blue.


Frame Material
carbon fiber
Suspension
fully rigid
Fork
Niner RDO
Crankset
32 t TruVativ Stylo OCT
Bottom Bracket
SRAM GXP
Cassette
20 t Niner Cogalicious
Chain
KMC 710SL
Brakeset
Avid Elixir 5
Brake Type
hydraulic disc
Rotors
Avid
Handlebar
Niner Flat Top Alloy
Handlebar Width
710 mm
Stem
Niner Alloy
Saddle
Niner branded WTB Volt Race
Seatpost
Niner Carbon
Wheelset
Stan's NoTubes 3.30 Rapid Singlespeed
Front Axle
15mm thru-axle
Tires
Schwalbe Nobby Nic
Tire Size
29 x 2.35 in
Pedals
not included
Recommended Use
cross country
Manufacturer Warranty
5 years on frame

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