What Type of Locks to Buy
The most important thing you can do is to purchase the best quality locks that you can afford. It doesn’t make
any sense to buy a cheap lock that won’t do much, if anything, to protect your significant investment.
For the best protection, use two different styles of locks (e.g. U-lock and cable/chain). Typically, thieves only carry one set of tools and would need two sets to attack your bike. Further, the process takes more time and increases their chance of getting caught. The two lock system is especially important if you leave your bike parked in one place for any length of time.
The Three Basic Types of Locking Devices
U-Lock
- By far the most secure type is the flat U (or D) shaped lock made of solid steel.
- The best position for the locking mechanism is in the centre of the crossbar, locks on the end can be pried off.
- For quick release mechanisms make sure your U-lock will fit around both wheels and a post, for example.
Cable
- While cable locks are convenient and easy to use, they are only sufficient for use in low-risk areas. A lightweight cable can be cut in less than five seconds. The overwhelming majority of stolen bikes were either unlocked or locked with a cable.
- Even the largest diameter unprotected cables are vulnerable. Better cable locks have overlapping steel jackets threaded over the cable. This makes it harder to cut the central cable.
- Cable locks can be used effectively as a secondary device to secure quick release components and accessories.
Chain
- Although heavy, a high quality, case hardened steel chain (minimum 3/8”) protects well.
- Many cyclists leave a heavy duty chain lock at a permanent location e.g. workplace.