To AIR 9 is human
An aluminum hardtail with the DNA of a trail bike

If a cross-country race bike met a rugged trail bike in the woods, their love child might look a lot like Niner's AIR 9 aluminum hardtail. This bike blends the agility and efficiency of a pedal-friendly XC bike with the versatility, toughness and capability of a rowdy trail rig.

Hit the trail on Niner's 2-Star SRAM SX build kit, without a hit to your wallet. Thanks to SRAM’s outstanding SX Eagle drivetrain, they can bring every ounce of AIR 9 performance to an affordable price level.

DURABLE, AFFORDABLE, ALUMINUM

RIDER TYPE: Cross Country, Trail
MAX WHEEL SIZE: 29er
SIZE RANGE: XS, S, M, L, XL
COLORS: Silver/Baja Blue

• Marzocchi Bomber Z2 Rail suspension fork, 120mm
• Race Face bar and stem
• SRAM SX Eagle drivetrain

Run it geared. Run it singlespeed. Comfortable enough for all day riding and quick enough to pin it at the races, the new AIR 9 handles what you throw at it. Genetically engineered? Maybe not. But it sure is fun to ride.

- FEATURES -

Versatility x durability = maximum fun factor

Let's face it. The AIR 9, Niner's lightweight aluminum hardtail, has always been capable. So how do you make capable even better? For one thing, Niner keeps the excellent qualities of their tried and true, hydroformed aluminum. Lightweight and snappy, poppy and peppy, the AIR 9 has plenty of stiffness to get you up to speed when you stomp on the pedals.

Next, apply their [R]evolution geometry which puts the rider in the sweet, balanced spot on the bike and the ride experience goes up, way up. Then, add Boost 148 spacing because tire and wheel options are a good thing. Top it off with internal routing for a dropper post and you've made one capable bike even more capable.

Not just any old aluminum

This modern metal alloy is tried and true. Niner has been working with aluminum and other alloys for more than a decade, and they are proud of their know-how. The resulting hydroformed AIR 9 frame makes the most of the material properties to blend stiffness and comfort in a durable package.

Fitted with a 120mm fork and with room for oversized, 29x2.4” (or 27.5x3.0”) tires, this bike is fit for any trail. It’s optimized for modern trail riding, long days in the saddle, and all-around good times.

“Trail country” geometry

Blurring the lines between modern trail bike geometry and traditional cross-country geometry, the AIR 9 occupies a niche we lovingly call “trail country.” If you’re doing a combination of long pedaling rides, stiff climbs, extended descents, and spicy technical sections, you’ll love what Niner's done here. “Trail country” geometry translates to modern trail manners when you need them most, with no sacrifice of efficiency or agility

The roomy cockpit has a comfortable reach for short stem lengths, giving you quick handling and plenty of maneuverability to blast through rock gardens and cut hard corners. The steep 74-degree seat angle gets you centered over the BB for climbing and pairs nicely with the short 430mm chainstay length for supreme pedaling efficiency. And of course, the slack, 68-degree head tube angle and long wheelbase contribute stability and self-confidence when you’re dropping into the steepest lines.

- NINER TECHNOLOGY -

• TIRE CLEARANCE
  Need room to roam? Niner has it. The AIR 9 has clearance to run your choice of 29er or 27.5+ wheels and tires.
  

• BIOCENTRIC 30
  Do you yearn for simplicity? Niner's patented BioCentric bottom bracket system gives you the freedom to easily go single-speed or geared.
  

• PROTECTION WHERE YOU NEED IT
  Factory-installed, integrated frame protection to keep your ride safe from harm, even when you’re in over your head.
  

• HYDROFORMED ALUMINUM FRAME
  Welded, hydroformed aluminum yields a strong, lightweight frame with tube shapes for optimized ride quality. 

• LIFETIME WARRANTY
  Niner has you covered with warranty service, small parts, and a support team that actually answers the phone. So go ahead, search out a gravel road you’ve always wanted to explore.

- TECHNICAL SPECIFICATIONS -

- NINER GEOMETRY -

- BIKE SIZING -

Looking for the perfect size? Check out our handy quick reference chart below (NOTE: The chart assumes average limb and torso proportions). Not sure about your size? Just send us your measurements using our Bike Sizing form and one of our experts will help you out!

For riders who fall between sizes, Niner recommends sizing down for a more maneuverable ride or sizing up for more stability.

- WARRANTY -

We're an authorized Niner dealer, which means that every bike we sell is backed by Niner's warranty, including a one-year complete bike warranty and a lifetime frame warranty.  For full details, click here.