Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Niner
Previous used estimate
$888 - $914
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. A tapered headtube with just the right amount of slack translates into precision steering through the technical stuff so you get to the finish line faster. It's mated to a RockShox SID XX fork that gives you 100mm of lightweight, trail-taming travel, so you get fast and stay there on the race course. Speaking of going fast, you get the right gear at the right time with a smooth-shifting Shimano XT drivetrain that keeps American Classic Race wheels rolling over rocks and roots with 29-inch ease. Top this smooth rig off with a host of Niner carbon and aluminum components and the result is a fast, fun, and ferocious race course 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.