Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Niner
Previous used estimate
$944 - $971
Actual value depends on condition, size, and local demand.

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The word sleek gets thrown around a lot, but Niner's Air 9 RDO takes it to heart with its purpose-driven curves that own the label completely. Beyond the pretty looks, the Air 9 RDO features an impressive carbon layup that shaves grams while giving you the whippy feel you want in tight singletrack and the stiffness you need on climbs. An aggressive head tube angle and tapered steerer translate into precision steering through the technical stuff. It's mated to a RockShox SID XX WC fork that gives you 100mm of trail-taming travel so you get fast and stay there. Speaking of going fast, the crisp-shifting Shimano XT/XTR drivetrain keeps American Classic Race wheels rolling over rocks and roots with speed and ease. Top it off with a host of Niner carbon components and the result is a fast, fun, and ferocious race-ready XC competitor.
Inspection
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Inspection
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Confirm fork and rear shock service intervals and check pivot bearings for play.