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  • Niner 27.5+ 2-Star Complete Mountain Bike
  • Niner 27.5+ 2-Star Complete Mountain Bike Detail
  • Niner 27.5+ 2-Star Complete Mountain Bike 3/4 Back
  • Niner 27.5+ 2-Star Complete Mountain Bike Detail
  • Niner 27.5+ 2-Star Complete Mountain Bike Detail
  • Niner 27.5+ 2-Star Complete Mountain Bike Detail
  • Niner 27.5+ 2-Star Complete Mountain Bike Detail
  • Niner 27.5+ 2-Star Complete Mountain Bike Detail
  • Niner 27.5+ 2-Star Complete Mountain Bike Detail
  • Niner 27.5+ 2-Star Complete Mountain Bike Detail
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NinerAIR 9
27.5+ 2-Star Complete Mountain Bike
$1,950.00

Item # NNR009Q

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  • Black/Cyan, XS ($1,950.00)
  • Black/Cyan, S ($1,950.00)
  • Black/Cyan, M ($1,950.00)
  • Black/Cyan, L ($1,950.00)
  • Black/Cyan, XL ($1,950.00)
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Item # NNR009Q
Description

AIR 9 27.5+ 2-Star Complete Mountain Bike

Who needs rear suspension when you have low pressure plus tires to smooth out the ride? Rolling on plush 2.8-inch tires, the Niner AIR 9 27.5+ 2-Star Complete Mountain Bike gives you boatloads of traction and bump compliance with the efficiency and simplicity that can only come from a hardtail. It's ideal if your riding typically consists of rocky terrain, root-latticed trails, or kitty litter over hardpack as its high-volume tires and 120-millimeter fork soaks up the hits and adds never before experienced grip. We feel that the Air 9 27.5+ is a solid upgrade if your bike is a few seasons old and you're looking for a more progressive geometry trail hardtail that isn't typically found on other cross-country bikes.

Niner starts this build with a hydroformed aluminum frame that creates a lightweight ride with excellent trail feel. Using a multi-staged hydroforming process, a straight tube is butted and mechanically formed in preparation of the hydroforming process. Up next is multi-stage hydroforming, which is a series of molds used in sequence to create complex shapes. Multiple steps might take Niner longer, but they're able to reduce weight and achieve higher strength. Hydroforming uses molds and fluid pressure to form metal tubes into shapes ideally suited for certain locations along the bike frame, meaning Niner can dial in the bike's riding characteristics exactly how they'd like.

Besides using a hydroforming process to create a remarkably strong and relatively lightweight aluminum frame, the AIR 9 27.5+ comes with more progressive trail geometry that's a sigh of relief if you're transitioning from an overly stiff and twitchy handling cross-country bike. Considering its head tube angle of 68 degrees, it'll handle the rough stuff with greater composure and descend confidently on steep chutes and high-speed sections. However, it's still highly efficient at pedaling back uphill and covering large swaths of terrain, seeing as it isn't as slack as many of the trail bikes on the market. Sub 17-inch chainstays (16.9 inches to be exact) breathe agility and cornering prowess into this trail bike, meaning you'll have a blast railing berms and finally clean those tricky uphill switchbacks.

This 2-Star NX build outfits the bike with 2.8-inch Maxxis Rekon+ tires that absolutely steamroll over anything in its path, allowing you to ride over loose rocks, bumpy roots, and other trail furniture that would normally leave your wrists feeling like you're operating a jackhammer. Besides smoothing out the ride, plus-sized tires grip a lot better over loose soil and wet roots, allowing you to drop the tire pressure and add a bigger footprint to the ground.

Another notable feature of this build includes a 120-millimeter RockShox Judy Gold Fork that offers more leeway for riding technical trails, especially if you're comparing it to hardtails with only 100-millimeters of front travel. Additionally, it sports a simplified SRAM NX 1x12 drivetrain, which provides plenty of usable gears with its larger cassette, without dealing with the complexities of a front derailleur and additional chainring.

  • 27.5+ alloy hardtail confidently rolls over anything on the trail
  • Plus-sized tires smooth out rocks and provide tons of traction
  • Progressive trail geometry is more relaxed and confident on descents
  • Geometry is nimble around corners and stable at speed
  • Compatible with Niner Biocentric 30 for converting to singlespeed
  • Internal dropper post routing for future upgrades
  • RockShox Judy Gold 120mm fork provides ample travel for rough trails
  • SRAM NX 1x12 drivetrain offer range without a front derailleur
Tech SpecsGeometry
Tech Specs
Frame Material
aluminum
Fork
RockShox Judy Gold RL Solo Air
Front Travel
120mm
Headset
Niner ZS
Shifters
SRAM NX Eagle
Rear Derailleur
SRAM NX Eagle
Crankset
SRAM NX Eagle DUB
Chainring Sizes
32t
Bottom Bracket
SRAM DUB
Bottom Bracket Type
PF30
Cassette
SRAM PG 1230
Cassette Range
11 - 50t
Chain
SRAM NX Eagle
Brakeset
SRAM Level
Brake Type
hydraulic disc
Rotors
SRAM G2CS [front] 180mm, [rear] 160mm
Handlebar
Race Face Aeffect R
Handlebar Rise
20mm
Handlebar Width
780mm
Grips
Niner Grrrips lock-on
Stem
Race Face Aeffect R
Stem Length
40mm
Saddle
Niner Custom Cr-Mo rails
Seatpost
Niner Alloy
Seat Collar
34.9mm
Wheelset
Niner Alloy
Front Axle
15mm Boost
Rear Axle
12 x 148mm
Tires
Maxxis Rekon+ 3C/EXO/TR
Tire Size
27.5 x 2.8in
Pedals
not included
Recommended Use
cross-country, trail
Manufacturer Warranty
5 years on frame
Geometry

100mm Travel Fork

 
XSSMLXL
a Seat Tube
14in15.5in16.5in19in21in
b Effective Top Tube
22.6in23.2in24in24.8in25.6in
c Stack
23.7in23.9in24.3in24.6in25in
d Reach
15.5in16in16.7in17.4in18in
e Stand Over
27.1in28.5in29.3in31.3in33in
f Head Tube
3.7in4.1in4.3in4.9in5.7in
g Head Tube Angle
70o70o70o70o70o
h Seat Tube Angle
73o73o73o73o73o
i Bottom Bracket Height
     
j Bottom Bracket Drop
2.28in2.28in2.28in2.28in2.28in
k Chainstay
17.1in17.1in17.1in17.1in17.1in
l Wheelbase
42.3in42.9in43.7in44.5in45.3in

120mm Travel Fork

 
XSSMLXL
a Seat Tube
14in15.5in16.5in19in21in
b Effective Top Tube
22.8in23.3in24.2in25in25.7in
c Stack
24in24.2in24.6in24.9in25.3in
d Reach
15in15.5in16.2in16.8in17.5in
e Stand Over
26.7in28.1in29in31in32.8in
f Head Tube
3.7in4.1in4.3in4.9in5.7in
g Head Tube Angle
69o69o69o69o69o
h Seat Tube Angle
72o72o72o72o72o
i Bottom Bracket Height
     
j Bottom Bracket Drop
2in2in2in2in2in
k Chainstay
17.1in17.1in17.1in17.1in17.1in
l Wheelbase
42.3in42.9in43.7in44.5in45.3in
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