Protect your bike with Giant's SureLock Protector DT U-Lock. It boasts a 9-inch-long heat-treated, hardened-steel shackle that's a half-inch thick, as well as a pick and drill-resistant keyed lock. The extra-length lets you lock your bike to extra-thick posts and the included 4-foot-long cable lets you include your wheels in one securely locked package. You also get 3 laser-cut keys for protection. Plus, it's vinyl coated so it won't scratch your bike and it comes with a handy carrying bracket that fit almost any bike tube so you'll never forget your lock.