Heavy Duty Hardened Steel U-Lock

With a shackle width of 6 inches and a height of 8.25 inches, this lock provides enough clearance for most standard bike frames and rack posts. However, if you have an e-bike with an oversized frame or thick tubing, you may want to measure your frame diameter first to ensure a comfortable fit.

Yes, the protective vinyl coating acts as a buffer between the hardened steel and your bicycle frame. It effectively prevents the metal-on-metal contact that typically causes scratches and chips during locking and unlocking.

The sliding dust cover is essential for outdoor use because it seals the keyway against dirt, grit, and moisture. By keeping debris out of the disc cylinder, it prevents the internal mechanism from jamming or corroding over time.

The included mounting carrier bracket is designed to fit most standard bicycle frame tubing. While it is versatile, it may not fit frames with non-standard shapes, such as very thick aero-tubing or some carbon fiber frames.

This lock uses a 13mm hardened steel shackle and a double-locking mechanism, which makes it significantly more resistant to cutting, sawing, and prying than flexible cable locks. The disc-keyed cylinder also offers a much higher level of protection against picking attempts.