| Cable locks Theses offer the advantage of being flexible and are easy to wrap around various street furniture. They also coil up and therefore make for easier transportation They come in various lenghts and thickness and better locks will be made of a fine braided cable construction. |
(arm) |
| Chain locks These are flexible and come in various lenghts but tend to be shorter and heavier than cable locks. The Strength of the chain depends on the type of steel and the gap between the links. Better chain locks will have small spaces and be constructed of hardened steel. |
(chain) |
| D locks These are the most secure types of locks They are constructed of hardened steel and come in 2 parts, the housing with locking mechanism, and the 'D' shaped bar. They are heavy and transporting them can be difficult They are not that large in size so would not fit round a lamppost. |
(d) |
| Extension cables These tend to be cables of loops at the end to be used with D locks and allowing the locking of wheels and to lock bikes to larger objects. |
(ext) |
| loop locks These are locks that attached directly on to your bike frame and a bar locks through the spokes and prevent the wheel from rotating. |
(loop) |