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Niner Air 9 RDO Mountain Bike Frame - 2017

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$2,000.00

Item # NNR004X

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  • Black/Red, XS ($2,000.00)
  • Black/Red, S ($2,000.00)
  • Black/Red, M ($2,000.00)
  • Black/Red, L ($2,000.00)
  • Black/Red, XL ($2,000.00)
  • CMYK, XS ($2,000.00)
  • CMYK, S ($2,000.00)
  • CMYK, M ($2,000.00)
  • CMYK, L ($2,000.00)
  • CMYK, XL ($2,000.00)
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Catch air.

While we've been known to rip some gnarly trails on a cyclocross rig and bask in the adrenaline rush of simply surviving with life and limb intact, we'll readily admit that sometimes a little bit of squish would make the ride a lot bit better. For those of us that love to ride fast and revel in the challenge of nimbly picking through technical, rocky sections that full suspension whips plow indiscriminately through, Niner drops the 2017 Air 9 RDO Mountain Bike Frame. With a Boosted rear axle spacing and tweaked geometry, this hardtail is ready to shred.

The most notable changes include a lower handlebar height, giving the Air 9 a nudge towards the venerable RKT 9 RDO's aggressive positioning. Paired with a longer cockpit and slacker head tube, this makes for a frame that handles deftly on knife-edge lines and jumps the second you need it to. Compared to the previous Air 9 the chainstays scrunched in by 4mm to 435mm for lightning fast acceleration and nimble handing without crossing over into jumpy, squirrely territory.

The new Air 9 RDO also sizes down its seatpost diameter to 27.2mm to take advantage of that little bit of extra flex and resulting comfort found in a narrower post. Out back, this year's model now boasts another different dimension; namely, a 12 x 148mm Boost axle width, keeping it in line with current trends for wider hubs and stiffer wheelsets. Niner also tucks the brake caliper mounts on the chainstay, neatly within the rear triangle. This makes sense from a frame building standpoint, as the seatstay is generally the burlier of the two rear stays and the placement protects the caliper somewhat in the event of a crash. We also think that particular placement just plain looks better than an ungainly bump hovering above a seatstay.

As with Niner's other RDO offerings, the Air 9 RDO is constructed using Niner's Carbon Compaction System (CCS), which gives Niner complete control over tube wall thickness across the frame. This makes for tube walls that are virtually perfect, reduces the amount of materials required, and eliminates excess resin build-up. The result is a claimed weight loss of 10%, which is a nearly unheard of leap between model years.

The Air 9 RDO’s large bottom bracket area provides stiff, efficient power transfer and sure handling, with the added bonus of versatility when choosing your bottom bracket. Opt for the standard PF30 on a geared setup, or swap it out for Niner's separately sold BioCentric 30 bottom bracket cups to go singlespeed or for compatibility with your favorite 24mm spindle cranks.

The 2017 Niner Air 9 RDO Mountain Bike Frame is designed to pair with a 100mm travel fork for race-worthy, aggressive positioning or a 120mm fork for more upright, all-day trail fun.

Tech Specs

Frame Material:
carbon fiber
Suspension:
hardtail
Wheel Size:
29 in
Fork Travel:
[recommended] 100 - 120 mm
Head Tube Diameter:
1-1/2 to 1-1/8in tapered
Headset Included:
yes, Cane Creek 40
Bottom Bracket Type:
73 mm PressFit 30
ISCG Tabs:
no
Cable Routing:
internal
Front Derailleur Mount:
34.9 high clamp
Derailleur Pull:
bottom, side
Brake Type:
disc
Seatpost Diameter:
27.2 mm
Seat Collar:
31.8 mm
Rear Axle:
12 x 148mm Boost
Recommended Use:
cross country
Manufacturer Warranty:
5 years

sizing chart

AIR 9 size by rider height

|

Geometry chart

Niner

Geometry Chart

 

Air 9 RDO
100mm 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
XS 14in 22.6in 23.7in 15.5in 27.1in 3.7in 70o 73o 2.28in 17.1in 42.3in
S 15.5in 23.2in 23.9in 16in 28.5in 4.1in 70o 73o 2.28in 17.1in 42.9in
M 16.5in 24in 24.3in 16.7in 29.3in 4.3in 70o 73o 2.28in 17.1in 43.7in
L 19in 24.8in 24.6in 17.4in 31.3in 4.9in 70o 73o 2.28in 17.1in 44.5in
XL 21in 25.6in 25in 18in 33in 5.7in 70o 73o 2.28in 17.1in 45.3in
120mm 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
XS 14in 22.8in 24in 15in 26.7in 3.7in 69o 72o 2in 17.1in 42.3in
S 15.5in 23.3in 24.2in 15.5in 28.1in 4.1in 69o 72o 2in 17.1in 42.9in
M 16.5in 24.2in 24.6in 16.2in 29in 4.3in 69o 72o 2in 17.1in 43.7in
L 19in 25in 24.9in 16.8in 31in 4.9in 69o 72o 2in 17.1in 44.5in
XL 21in 25.7in 25.3in 17.5in 32.8in 5.7in 69o 72o 2in 17.1in 45.3in

Reviews & Community

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Dangerously Fast

  • Familiarity: I've put it through the wringer

Replaced a 9 year old Air 9 Aluminum. Upgraded to RDO, Industry Nine wheel set and XT brakes. This frame is great for climbing and if you are coming from aluminum it rides softer and holds a line better on the downhill. I love it.
Just wish Niner had included a chain suck guard. Seems cheap of them not to.

what is the weight in grams of the Air 9 RDO frame? (Why is it not posted if it's so light?)

Hey Matthew - These Air 9 RDO frames weigh approximately 1,050 grams with hardware (seat collar and derailleur hanger, plus paint and protective tape). Feel free to contact me directly with any additional questions, especially if you are interested in ordering this frame or building a complete bike.

- Kyle L. - Expert Gearhead - klivingston@backcountry.com - 801-736-4337

New and Improved!

    One of my favorite hardtails we offer. The new version of this bike features boost spacing making the bike very laterally stiff which equates to incredible power transfers. Its a very fast and efficient ride and highly recommended!
    If you need help configuring this frame or have quesions with it or the new boost spacing feel free to reach out to me direct.
    Wes Branham- Account Manager -Bike
    801-204-4542
    wbranham@competitivecyclist.com

    How much does the frame actually way? and why can't you put fox 32 100mm on the bike in the configuration process?

    I will check with Niner on the frame weight for you. We can spec the bike with a 100mm fork as well. Send me an email on how you would want the bike spec'd and I will shoot you over a quote.

    wbranham@competitivecyclist.com