Niner 2021 Air 9 Alloy Hardtail 2-Star

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The Air 9 aluminum hardtail blends the agility and efficiency of a pedal-friendly XC bike with the versatility, toughness and capability of a rowdy trail rig. 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.
[R]evolution geometry puts the rider in the sweet, balanced spot on the bike. 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.


6061 Aluminum Frame: Hydroformed aluminum blends stiffness and comfort in a durable package. 
Tire Clearance: The Air 9 has clearance to run your choice of 29er or 27.5+ wheels and tires.
Lifetime Warranty: Ride, race, rally with confidence. Niner has you covered with warranty service, small parts, and a support team that actually answers the phone. Read more here >
Biocentric 30: BioCentric bottom bracket system gives you the freedom to easily go single-speed or geared. 
Frame: Hydroformed and welded 6061-T6 Aluminum
Fork: N/A
Max Front Suspension: 120mm   
Color: Silver/Baja Blue 
Available frame sizes: XS, S, M, L, XL
Seat collar size: 34.9mm 
Seat post size: 30.9mm 
Max Rear rotor size: 180mm 
Max Chainring Size: 1x max chain ring size 34T - Boost chainring recommended    
Front Deraileur Type: 34.9 side swing, front full   
Cable routing: External 
Headset size: 1.125" x 1.5" tapered integrated (campy style) head tube, Headset included (Cane Creek description: IS42/28.6 IS52/40) 
Chainring compatibility: standard 1x, 2x, and 3x systems 
Q-Factor: 168mm 
Bottom Bracket type: 73mm PF30 BB Shell (adaptors required for BSA Type BBS) (compatible with Biocentric 30BB
Brake mount type: Post mount 

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