Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Diamondback
Previous used estimate
$726 - $747
Actual value depends on condition, size, and local demand.

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Break down the walls of what you thought was rideable on Diamondback’s Mason FS 29. Its lightweight aluminum frame and rock-conquering 29-inch wheels climb the impossible, while its slack head angle, stout 142x12mm rear through-axle, and 140mm of Fox-powered Knuckle Box suspension let you descend like a pro. A big 140mm Fox 34 fork helps out, too. A Race Face crank and SRAM X9 Type 2 derailleur are the rugged heart of this all-mountain 2x10 drivetrain, and Avid's Elixir 5 brakes scrub speed as you dive into turns. Outfitted with an Easton stem and seatpost, Diamondback's burly ProBar, and Kenda's legendary Nevegal tires, you’ve got a mountain-slaying package that easily handles all-day epics, as long as you take the gnarly line down.
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.