Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Diamondback
Previous used estimate
$397 - $408
Actual value depends on condition, size, and local demand.

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Diamondback’s Mason Comp is a uniquely bred all-mountain slayer. Its lightweight aluminum frame and rock-conquering 29-inch wheels climb like a racer, while its slack head angle, stout 142x12mm rear through-axle, and smooth 140mm-travel RockShox Sektor fork let you descend like a pro. You’ll also love how the rugged, crisp-shifting 1x10 Race Face/SRAM drivetrain powers up climbs, and how the Avid Elixir 1 brakes deliver all-conditions speed control. Outfitted with a Race Face bar, a Crank Brothers dropper seatpost, and awesome Kenda tires, you’ve got an outstanding package to rail technical trails day in and day out.
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.