Giant SureLock Protector U-Lock

The included mounting bracket is designed to fit frame tubes ranging from 24mm to 40mm in diameter. If your bike frame is outside of this range, you may need to carry the lock in a bag instead.

With a shackle height of 11.5 inches, this lock offers more clearance than standard U-locks. It is generally long enough to secure your frame and a wheel to most standard bike racks or poles.

The lock comes with five laser-cut keys, which is a generous amount compared to most competitors. We recommend keeping one in a safe place at home and another in a dedicated spot in your bag as a backup.

Yes, the vinyl coating provides a protective barrier between the hardened steel shackle and your bike's frame. It effectively prevents the metal-on-metal contact that typically causes paint chips and scratches during daily use.

One of the five included keys features an integrated LED light, which is incredibly helpful for finding the keyhole in low-light conditions. It is powered by a small, replaceable battery inside the key head.

This lock features a hardened steel shackle and a pick-resistant mechanism, making it a solid choice for general urban security. However, for high-risk areas or long-term parking, we always recommend using a secondary cable or chain lock to secure your wheels.