Niner One 9 RDO and SIR 9 now available in blaze yellow

Loud and proud colours for Niner’s steel and carbon singlespeeds

Shield your eyes! Niner is rolling out its race-bred One 9 RDO carbon singlespeed and its soulful steel SIR 9 hardtail in eye-searing blaze yellow colourschemes.

Click through the gallery at right for detailed images of these bright bikes.

These two hard-to-miss models share the same frame features as their more subdued counterparts.

The One 9 RDO is a stripped-down hardtail with a full carbon frame designed for use as a singlespeed or with a 1x drivetrain. BikeRadar will have a One 9 RDO under test shortly.

The sir 9 can be built up with a 1x (shown) or with a fully-geared drivetrain:

The SIR 9 is constructed from a blend of Reynolds tubing and can be built up as a singlespeed or with a fully-geared drivetrain. We got an up-close look at the SIR 9 last summer.

Both the One 9 RDO and SIR 9 can accommodate forks with tapered steerers, have 142x12 rear Maxle through-axles, post-mount disc brake mounts located on the chainstay, and use Niner’s BioCentric II eccentric bottom bracket.

Their bottom bracket shells are also compatible with Niner’s modular CYA bottom bracket, which has press-fit reducers to allow the user to run almost any bottom bracket system on the market, including PressFit 30, BB30, PressFit 92 and a standard threaded bottom bracket.

For more information visit

Josh Patterson

Tech Editor, US
Josh has been riding and racing mountain bikes since 1998. Being stubborn, endurance racing was a natural fit. Josh bankrolled his two-wheeled addiction by wrenching at various bike shops across the US for 10 years and even tried his hand at frame building. These days Josh spends most of his time riding the trails around his home in Fort Collins, Colorado.
  • Discipline: Mountain, cyclocross, road
  • Preferred Terrain: Anywhere with rock- and root-infested technical singletrack. He also enjoys unnecessarily long gravel races.
  • Current Bikes: Trek Remedy 29 9.9, Yeti ASRc, Specialized CruX, Spot singlespeed, Trek District 9
  • Dream Bike: Evil The Following, a custom Moots 27.5+ for bikepacking adventures
  • Beer of Choice: PBR
  • Location: Fort Collins, CO, USA
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