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Niner ONE 9 RDO Carbon Mountain Bike Frame

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Item # NNR000S

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Item # NNR000S

Description

Riding a singlespeed takes grit. It may not be for everyone, but for those who get it, the satisfaction of crushing hills at a relentless pace is hard to beat. Since there’s a devoted following of singlespeed XC racers, Niner adapted its AIR 9 RDO to a simpler setup, and the result is the ONE 9 RDO Carbon Mountain Bike Frame. As its lineage would indicate, it’s light, stiff, and blazingly fast. And that translates into super-fast lap times, along with the perverse satisfaction known only to those who prefer to do things the hard way.

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.

Niner recommends an 80 to 100mm suspension fork, or a rigid unit with a 470mm axle to crown length and 45mm offset. Perhaps not coincidentally, their award-winning carbon fork shares those exact dimensions. 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 2.35in. It accepts only 160mm brake rotors, a limitation that’s befitting its cross country focus. The caliper attaches via a post mount. The maximum chainring size varies depending on the position of the BioCentric EBB insert, which accepts a standard 73mm BSA bottom bracket. At the most rearward position, the Niner recommends running no larger than a 28t chainring, and when in the forward position, it will accept a 36t ring.

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

  • Carbon fiber construction
  • Niner Bio-Centric eccentric bottom bracket
  • CYA bottom bracket shell
  • Cane Creek ZS headset
  • Tapered head tube
  • Internal cable routing
  • 12mm rear thru-axle

Tech Specs

Frame Material:
carbon fiber
Head Tube Diameter:
IS42/28.6 | IS52/40
Headset Included:
yes, Cane Creek ZS
Bottom Bracket Type:
Niner Bio-Centric EBB
Cable Routing:
internal
Front Derailleur Mount:
none
Seatpost Diameter:
31.6 mm
Seat Collar:
35 mm
Rear Axle:
12x142 mm thru-axle
Recommended Use:
cross country
Manufacturer Warranty:
5 years

sizing chart

Bike size by rider height

|

Geometry chart

Niner

Geometry Chart

 

One 9
80mm Travel Fork
 

Seat Tube

(c-t)

Effective Top Tube

(eTT)

Stack

(S)

Reach

(R)

Stand Over

Head Tube

(HT)

Head Tube Angle

(HTo)

Seat Tube Angle

(STo)

Bottom Bracket Drop

(BBD)

Chainstay

(CS)

Wheelbase
S 15.5in 23.1in 23.8in 16.3in 27.6in 4.1in 72o 74o 2.42in 17.3in 42.2in
M 16.5in 23.7in 24in 16.9in 28.4in 4.3in 72o 74o 2.42in 17.3in 42.8in
L 19in 24.5in 24.6in 17.4in 30.6in 4.9in 72o 74o 2.42in 17.3in 43.6in
XL 21in 25.2in 25.3in 18in 32.2in 5.7in 72o 74o 2.42in 17.3in 44.4in
100mm Travel Fork
 

Seat Tube

(c-t)

Effective Top Tube

(eTT)

Stack

(S)

Reach

(R)

Stand Over

Head Tube Length

(HT)

Head Tube Angle

(HTo)

Seat Tube Angle

(STo)

Bottom Bracket Drop

(BBD)

Chainstay

(CS)

Wheelbase
S 15.5in 23.2in 24.1in 15.8in 27.8in 4.1in 71o 73o 2.1in 17.3in 42.4in
M 16.5in 23.9in 24.3in 16.5in 28.6in 4.3in 71o 73o 2.1in 17.3in 43.14in
L 19in 24.6in 24.8in 17in 30.7in 4.9in 71o 73o 2.1in 17.3in 43.8in
XL 21in 25.4in 25.6in 17.6in 32.4in 5.7in 71o 73o 2.1in 17.3in 44.6in

Reviews & Community

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couldn't be happier.

  • Familiarity: I've used it several times

I'm 5'9, I purchased a Medium with the help of Jon J. I went with 780 bars with a 100mm stem, and the niner RDO 0offset post. Purchased the xx crankarms and then went with 32t direct mount 3mm offset chainring to bring the teeth away from the chainstay att the biocentric's most rear positions. sram 8speed chain. xt8000 brakes. xt pedals. ESI chunky grips. Stan's Crest. No issues at all.. yet. I have a 12nm torque key for the BB (prestacycle). no slippage yet. bike is stiff and the xtra wide bar helps grunt up climbs. Carbon fork is great, but very fatiguing... planning on getting a RebaRL in the near future.



SS setup with carbon fork/pedals/garminmount: ~18.5 lbs.

couldn't be happier.

Is it illegal to put approximate weights in bike descriptions? Surely there is some kind of disclaimer.

Most manufacturers don't publish weights , as frustrating as that is to riders.

1235 grams from what I have from a third party article. It didn't give a size but probably it was for a medium.

Hardtail classic!

    tried and true- one of the mtn bike classics. The kit calculator may not show all available options for a custom build but if we have it on the site we can build it. If you need help in configuring this bike feel free to contact me direct. Im always happy to oblige!

    Wes-Account Manager Bike
    wbranham@competitivecyclist.com
    801-736-6396 x 4074

    People are asking--does the One 9 RDO frame include a derailleur hanger?
    Yes, The ONE 9 RDO frame comes with the parts that you need to run the frame geared or Singlespeed.


    Why thank you, kind sir!

    Will this frame work in a 2x setup? Can it hold a front derailleur?

    What's the weight?

    Hi Petr, The One 9 RDO can run singlespeed or geared with a single front ring, but is not designed to work with any sort of front derailleur.

    Avg. ride time: 1h 49m per week
    • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

    Hardtail or Rocketship In Disguise?

    • Familiarity: I've put it through the wringer

    This bike rips! I currently have it setup 1x10 with a 32t ring up front for the early season but will convert this to SS soon. The EBB works great and fits the 32t with plenty of adjustment room for bigger rings. The only speed this bike seems to know is MASH. Power transfer is amazing. The bike is snappy and fast, handles well, and is absurdly light. Love the 142 rear spacing. Medium size is exactly what I expected. I'm running a 100mm Fox and geometry is perfect. Equipped with an RDO seatpost and bar and the bike is plenty comfortable for long days in the saddle. Get this and prepare to crush PR's and set new landspeed records on the climb up on your favorite trails.

    Hardtail or Rocketship In Disguise?
    Avg. ride time: 10h 43m per week
    • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

    I have a set of 2014 Mavic Crossmax SLR wheels that I was hoping to use for a Niner One 9 RDO build. However, it just occurred to me that all Sram 1x drivetrains have 11-speed cassettes and trigger shifters. Will an 11-speed cassette fit on the Mavic SLR freehub?



    I suppose I could buy the 1x front crank, and then purchase a 10-speed cassette and trigger shifter from another Sram group...is it worth going through this extra trouble?



    Thanks,

    Greg

    Greg,



    The Sram 11 speed cassettes required a special freehub body (MAV0521), which will work with your wheels.



    As far as mixing parts, 11 speed parts work best with each other. 11 speed chains, pulleys, cogs and chainrings are narrower than their 10 speed ancestors. I would just make the complete conversion.

    how about using a 11speed Shimano XT 8000 cassette, which wouldn't require a different freehub body? it is also cheaper than Sram.