Niner Air 9 FrameWhen Niner set out to design an aluminum version of their highly praised and World Cup tested Air 9, they didn’t settle for mediocrity when it came to the quality of alloy. Knowing that any sort of compromise in frame material would do injustice to the proven geometry, Niner shaped the Air 9 using high end hydroformed alloy that benefits from the same decade of refinement and testing as its carbon fiber siblings. To make Niner’s most economical cross-country race-frame both lighter and faster, this upgraded version integrates Niners hydroformed tubing throughout. More than just a chic technology marketing term, hydroforming allows Niner to shape and hinder the tubes for optimized strength and stiffness in key areas, giving the ability to create beautifully tuned frames with precise ride characteristics. Hydroforming is found in the top tube, downtube, headtube, chainstays and seatstays, equating to an overall much lighter and stiffer ride feel that promotes more precise steering and a snappier power transfer. The Air 9 features a tapered headtube with an integrated headset. By allowing the use of the newest generation of 1.