Whether you're a recreational cyclist or hardcore bike commuter, the strongest bike locks can let you feel more confident that when you leave your bike alone, it'll still be there when you get back.

CR tests a variety of locks with the tools commonly used by bicycle thieves Senior test program leader Bernie Deitrick plays the role of bicycle thief at Consumer Reports' Yonkers, N.Y., headquarters.

While there's no substitute for a big, burly, ultra-secure bike lock in high-theft-risk scenarios, sometimes a lighter, more compact lock is a bit more practical. That's where the Abus CombiFlex ...