Evolution series 4 standard heavy duty u-lock

Updated 2026-09-05

Striking the ideal balance between everyday usability and formidable security, this standard U-lock is a favorite among urban commuters. It features a massive 14mm hardened max-performance steel shackle designed to resist hand tools, bolt cutters, and leverage attacks. The protective vinyl coating prevents the metal shackle from scratching or marring your bicycle frame during locking.

Measuring four by nine inches inside, the shackle provides ample clearance for securing your frame and wheel to parking meters, racks, and poles. A high-security disc-style cylinder with a reinforced anti-drill and anti-pull design ensures reliable protection against tampering. The included transit transport bracket mounts securely to your frame for effortless carrying between destinations.

Whether you navigate busy college campuses or bustling downtown business districts, this heavy-duty security device offers dependable peace of mind. Its weather-resistant vinyl cover protects internal components from dirt, grit, and moisture over years of daily service. Invest in proven bicycle protection to keep your primary mode of transportation safe.

See details