Abus Ultra 410K U-Lock

This lock holds a Sold Secure Silver rating. It is a solid choice for daily commutes and recreational use in moderate-risk areas, offering a reliable balance between theft deterrence and portability.

The included SH34 mounting bracket is designed to fit round frame tubes with a diameter between 24mm and 35mm. It is a standard size that works with most commuter and hybrid bicycle frames.

No, the design has been specifically engineered to minimize noise. The mounting system holds the lock securely in place, so you shouldn't hear any annoying clanking or rattling while you are on the move.

The shackle is 12mm thick and made of hardened steel. This thickness provides high resistance against bolt cutters and manual sawing attempts, making it a significant step up from cable locks.

The double-bolt mechanism locks both ends of the shackle into the crossbar. This is a key security feature because it requires a thief to make two separate cuts through the hardened steel to open the lock, rather than just one.