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The short version

  • Secure the frame to an immovable object
  • Use the smallest practical gap
  • Protect removable wheels
  • Match the rating to insurer requirements
  • Avoid relying on a thin cable alone
01

Lock types

A second lock of a different type can force a thief to use more than one tool. That can be worthwhile for higher-value bikes or predictable all-day parking.

  • D-lock: strong and relatively portable
  • Chain: flexible around awkward stands but heavy
  • Folding lock: compact with variable security
  • Cable: useful as a secondary wheel restraint, not primary high-risk security
02

A better locking method

  1. 1

    Choose a busy, well-lit stand fixed securely to the ground.

  2. 2

    Lock the frame, not only a wheel.

  3. 3

    Fill unused space inside the lock to reduce leverage.

  4. 4

    Keep the lock away from the ground where it is harder to strike.

  5. 5

    Secure quick-release wheels and remove easily detached accessories.

03

Ratings and policy requirements

Independent security ratings are useful, but product ratings can change and insurers may specify an exact level. Confirm the current product listing and your policy wording before purchase.