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Checking a bike frame number: how it works and why it matters
December 22, 2025

Checking a bike frame number: how it works and why it matters

Learn how to check a bike’s frame number to avoid buying stolen bikes and increase the chance of recovery after theft.

With a BIKEBAZE® SafeTag you reduce the risk of theft by 98%.

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Direct answer: You can check a bike’s frame number by locating it on the bike and verifying it in a bicycle database. This helps you see if a bike is registered as stolen and increases the chance of recovery.

What is a frame number?

A frame number is a unique identification number engraved into the bike frame by the manufacturer. It is used to identify a specific bicycle and link it to an owner.

Where can you find the frame number on a bike?

The frame number is usually located:

  • Under the bottom bracket
  • On the seat tube
  • On the head tube near the handlebars

On electric bikes, it may be located under the battery.

How do you check a frame number?

Checking a frame number involves:

  1. Locating the frame number on the bike
  2. Writing it down exactly
  3. Checking it in a bike registration database
  4. Verifying whether the bike is reported stolen

This is especially important when buying a secondhand bike.

Why checking a frame number is important

  • It helps you avoid buying a stolen bike
  • It allows you to prove ownership
  • It increases the chance of recovering your bike

A frame number alone is often not enough. Registering your bike with visible identifiers and stickers adds extra protection.

Register your bike for FREE now

With a BIKEBAZE® SafeTag you reduce the risk of theft by 98%.