Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Diamondback
Previous used estimate
$134 - $138
Actual value depends on condition, size, and local demand.

12-month projected trend
— %
Direction and magnitude, not judgment
vs. category average
3%
Holds value better than category avg
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
Choose a different build or frame style to see its value.
Zipping around town and commuting to work in style, it's all fair game to Diamondback’s Insight STI-1! It sports a nimble-handling Diamondback aluminum frame and efficient, road bike size aluminum wheels for a quick, smooth ride. You’ll love the sleek look and simple operation of the singlespeed drivetrain and the nice all-conditions stopping power of the Tektro linear-pull brakes. You'll also appreciate the supportive seat, quality Kenda tires, and fine Diamondback components stem to stern.
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.