Bike Locks

The most secure type of bike lock is a hardened security chain with a quality padlock, or a sturdy D lock. Both resist cutting and leverage far better than cable locks. Look for a strong Sold Secure rating.

Using more than one bike lock is a smart move. Two locks force a thief to carry and use different tools. That slows them down and makes your bike a less tempting target.

A D lock is a rigid metal lock shaped like the letter D, sometimes called a U lock. Its solid shape leaves little room for bolt cutters or other leverage tools, so a D-lock bike setup is tough to break.

Sold Secure Silver is the sensible minimum for a bicycle lock. Gold or Diamond suits higher-risk spots, such as city centres or overnight street parking. Check your insurer's terms too, because some set a required rating.

Locking your bike correctly is about securing the frame, not just a wheel, to a fixed object that can't be lifted. Keep the lock off the ground and fill the space inside it so there's no room for tools.