Bicycle Buying Guide: What to Check Before You Buy Secondhand

A secondhand bicycle can be excellent value, but frame damage, drivetrain wear, and theft history are all things a listing photo alone won't reveal.

Before you view the bike

• Ask for the frame size and confirm it fits you — a great bike in the wrong size is a poor purchase regardless of price.
• Ask about the bike's age, usage (commuting vs. off-road), and whether it's ever been in an accident.
• Request close-up photos of the frame near the welds and joints, where cracks are most likely to appear.

What to inspect in person

• Frame: Check for cracks, dents, or rust, especially around welds and the bottom bracket.
• Wheels: Spin each wheel and check it runs true without wobbling, and inspect the rim for dents or excessive brake wear.
• Drivetrain: Check the chain, cassette, and chainrings for wear — a stretched chain will need replacing soon and can indicate a bike that's had heavy use.
• Brakes: Test that both brakes engage firmly and evenly.
• Suspension (if applicable): Check for smooth travel without excessive play or oil leaks around seals.

Confirming it isn't stolen

Ask for the frame serial number (usually stamped under the bottom bracket) and, if possible, check it against a stolen bike registry. A seller who can't or won't provide the serial number, or has no proof of purchase for a higher-end bike, is a reason to be cautious. For higher-value bikes bought remotely, RahaKaitse escrow lets you confirm the bike matches the description before your payment is released.