Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2012 Trek 3900 Disc
Previous used estimate
$158 - $162
Actual value depends on condition, size, and local demand.
Value Guide market data · 2012 Trek 3900 Disc
12-month projected trend
1%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2012 Trek 3900 Disc
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All 3900 model years
Compare 3900 Disc models
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Overview
About this bike
Whether you're cruising the local trails or simply enjoying streets and bike paths for fitness and fun, the 3900 Disc is the perfect ride. Trek's Silver aluminum frame is light, tough and responsive, and you'll love the bump-busting 100mm-travel suspension fork. This sweet machine boasts an easy-pedaling 24-speed drivetrain that makes easy work of the hills and powerful mechanical-disc brakes to perfectly modulate your speed. The 3900 will bring you cycling joy for years to come.
Specifications
- Category
- Mountain
- Product Family
- 3900
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork and rear shock service intervals and check pivot bearings for play.