Titanium Bow-Locks™ that get out of your way until you need to lock your bike. TiGr® Locks redefine the bicycle lock. Unlike conventional bike locks (u-locks, chain, etc.) TiGr® Locks fit the elegant simplicity of your bike and are easy to carry! Learn how the TiGr® Locks work, and see how easy they are to use and operate. With TiGr® Locks bow width=security. To allow for different security, TiGr® Locks come in two bow widths, each providing a different level of security.