Bike locks / Pentagon Locks / Diamond rated large security u-lock
Pentagon Locks

Diamond rated large security u-lock

$90
Catalog updated 2026-10-21

This u-lock represents the pinnacle of bicycle security with its Sold Secure Diamond rating. Designed to withstand the most aggressive attacks, it is the ideal solution for high-value e-bikes and motorcycles parked in vulnerable locations. The extra-large 11.8 in shackle provides the clearance needed to secure frames to thick lamp posts.

The keyed locking system utilizes advanced cylinder technology to prevent tampering and drilling. The hardened steel construction is specifically treated to resist hydraulic cutters and power tools, providing peace of mind for owners of premium electric mobility devices. Its substantial size ensures that you are never limited by the geometry of the bike rack.

While built for maximum strength, the lock remains portable enough for daily commuting. The durable exterior finish protects the internal steel from corrosion, ensuring the locking mechanism remains smooth over years of outdoor use. This is a professional-grade security tool for those who refuse to compromise on the safety of their equipment.

Diamond rated large security u-lock
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Pentagon Locks
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Keyed Electric scooter locks Motorcycle grade locks Heavy duty U-locks For electric bikes Sold Secure Diamond rated locks
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