Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
Previous used estimate
$1,744 - $1,794
Actual value depends on condition, size, and local demand.

12-month projected trend
2%
Direction and magnitude, not judgment
vs. category average
4%
Drops faster than category avg
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
The best-of-the-best, no-holds-barred, built for cross-country victory Superfly FS 9.9 SL is here. The FS 9.9 SL uses a race-light, yet trail tough OCLV carbon frame with a 100mm of travel along with Trek's proven technologies: G2 geometry, carbon armor, internal cable routing, E2 head tube, carbon link, and ABP suspension. That all translates to bike that weighs less than most hardtails, climbs like a banshee, and slices singletrack like a surgeon. Nothing was spared to make you faster; you've got a RockShox RS-1 fork and Monarch XX shock, full 11-speed XX1 gearing, Avid XX brakes, and tubeless-ready, thru-axle DT Swiss wheels. A carbon bar, post, stem, and even carbon rails on your saddle make up the controls. The Superfly FS 9.9 SL XX1 is speed personified.
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.