First Look: New Niner AIR 9 Mountain Bike and RLT 9 Gravel Bike

For 2018 Niner’s Air 9 hydroformed aluminum hardtail mountain bike returns, with Boost 148mm rear axle spacing and clearance for up to 29x2.4” or 27.5x3.0” tires. Geometry also sees an update with a longer reach, shorter chainstays, steeper seat tube.