Motorcycle locks are security devices used on motorcycles to prevent theft. Disk-locks, a common type of motorcycle locks, use the holes in the brake disk to immobilize a motorcycle. Wheel locks of various shapes (U-locks, D-locks, O-locks) are used in a similar way to make the wheels immovable. Motorcycle locks that combine a locking mechanism with an alarm are referred to as disk lock alarms, wheel lock alarms etc. Leatherup.com offers a wide selection of motorcycle security devices, motorcycle alarms, motorcycle locks, disk-locks (disc-locks), disk-lock alarms, U-locks, chain locks, cable locks from brands such as Masterlock, Xena, Kryptonite, Bully, and OnGuard.