Abus bike lock chains combination 7210 85 110 abus 55141 the abus bike lock chain combination 55141 3 black 7210 85 has been designed for good protection at medium theft risk and is recommended for securing good bicycles the chain the case as well as supporting elements of the locking mechanism are made of special hardened steel p p this quality lock has a number of excellent features including a 7mm strong square chain with new functional long life and highly flexible mesh sleeve