Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Diamondback
Previous used estimate
$1,462 - $1,504
Actual value depends on condition, size, and local demand.

12-month projected trend
10%
Direction and magnitude, not judgment
vs. category average
6%
Drops faster than category avg
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
The dark art of aerodynamics doesn’t always follow intuition: when Diamondback teamed with industry experts HED and KQ Studios to design the Serios F, they ended up with revolutionary profiles that produce only half the drag of competitors’ bikes. A champ in the wind tunnel, it’s outside where it excels. In the real world of crosswinds and corners, this bike outperforms all others. The Serios F frame is a worthy centerpiece. It is constructed with unidirectional carbon to keep it light and efficient. With unique headset spacers, it’s able to fit every body shape: able to keep the entire Optum pro team comfortable, so they can concentrate on going faster than ever before. The geometry is that of a bike that handles: up, down, around hairpins—conditions you’ll actually encounter in a time trial or triathlon. Featuring a full Shimano Ultegra group and HED wheels, it is ready for race day. When every second counts, look to the Serios F to deliver.
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.