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Niner Air 9 RDO 3-Star XT 1x Complete Mountain Bike - 2017

$4,500.00

Item # NNR004T

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  • Black/Red, XS ($4,500.00)
  • Black/Red, S ($4,500.00)
  • Black/Red, M ($4,500.00)
  • Black/Red, L ($4,500.00)
  • Black/Red, XL ($4,500.00)
  • CMYK, XS ($4,500.00)
  • CMYK, S ($4,500.00)
  • CMYK, M ($4,500.00)
  • CMYK, L ($4,500.00)
  • CMYK, XL ($4,500.00)
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Item # NNR004T

Nimble like a cat.

If a full-suspension whip conquering terrain is akin to a moose barreling through the forest, then a hardtail is a sleek, precise puma deftly picking lines through rugged, rocky terrain and speeding over the flats. Channel your inner cheetah and hit the trails on the 2017 Niner Air 9 RDO 3-Star XT 1x Complete Mountain Bike. This build is ready to rip, kitted out with Shimano's XT one-by drivetrain and hydraulic brakes, Boost axles, 100mm of Fox Float travel up front, Niner's carbon fiber post, and a set of smooth rolling, impeccably reliable Stan's NoTubes Arch EX hoops wrapped in versatile Maxxis Ikon tires.

The most notable changes to the frame 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 handling without crossing over into twitchy, 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 its corresponding comfort — found in a narrower post.

Out back, this year's model now boasts 12 x 148mm Boost axle spacing, keeping it in line with current trends for wider axles 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 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 10% weight reduction, which is a nearly unheard of leap between model years.

Tech Specs

Frame Material:
carbon fiber
Suspension:
hardtail
Fork:
Fox 32 Float Factory FIT4, 3 Position w/ Adjust, Kashima Coat
Front Travel:
100 mm
Headset:
1-1/8 - 1-1/2 in Cane Creek IS42/IS52
Shifters:
Shimano XT M8000 11-speed I-Spec II
Front Derailleur:
n/a
Rear Derailleur:
Shimano XT M8000 GS 11-speed Shadow Plus
Crankset:
32 t Shimano XT M8000
Bottom Bracket:
Shimano XT MT80
Cassette:
11 - 42 t Shimano XT M8000
Chain:
Shimano XT HG-600 11-speed
Brakeset:
Shimano XT M8000
Brake Type:
hydraulic disc
Rotors:
[front] 180 mm Shimano RT86 Ice Tech, [rear] 160 mm Shimano RT86 Ice Tech
Handlebar:
Niner Flat Top Carbon
Handlebar Width:
710 mm
Grips:
Niner Grrrips lock-on nylon
Stem:
Niner Alloy
Saddle:
Niner Custom with Cr-Mo Rails
Seatpost:
Niner Carbon
Seatpost Diameter:
27.2 mm
Seat Collar:
31.8 mm
Wheelset:
Stan's NoTubes Neo/ZTR Arch EX
Hubs:
Stan's Neo
Front Axle:
15 x 110mm Boost
Rear Axle:
12 x 148mm Boost
Tires:
Maxxis Ikon 3C/EXO/TR
Tire Size:
[front] 29 x 2.35 in, [rear] 29 x 2.20 in
Pedals:
not included
Recommended Use:
cross country
Manufacturer Warranty:
5 years on frame

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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Boosted!

  • Familiarity: I've used it once or twice and have initial impressions

Niner was the first to the part in putting the new Boost spacing to use on XC race bikes with the RKT, and now they've done it with the brand new Air 9 RDO! Shorter chainstays and wider rear spacing means a more responsive bike under load, especially out of the saddle. A more slack front end provides better handling and a slightly more relaxed feel than the 2016 model.

If you like the previous Air 9 RDO, you are going to love the new setup. More responsive, easier to handle at high speed, and lighter; what more could you ask for!?

If you have any questions, please feel free to reach out to me directly.

Bradley Gehrig
Customer Account Manager
Office: 801–204-4541
bgehrig@backcountry.com