The Abus Bordo Combo 6100 Bicycle Lock ($95) offers the protection and strength of a U-Lock with greater flexibility and portability thanks to its links and rivet construction made of hardened steel. This innovative bike lock is built with a high precision, advanced key and tumbler system, anodized finish to prevent corrosion, and shockproof, synthetic coating to protect the bicycle frame. The Bordo Combo 6100 also comes with a sleek, storage case that easily attaches to the bike frame.