Street Cuffs (MasterLock's name for 'em) are awesome! They're pretty heavy to carry around, but they are a seriously secure way to lock up a bicycle. There's a 9-link version (longer chain between the cuffs) that can enable the user to secure up to 3 bicycles. Not cheap, but the peace of mind and sturdiness of the locks make it worth it.
Street Cuffs (MasterLock's name for 'em) are awesome! They're pretty heavy to carry around, but they are a seriously secure way to lock up a bicycle. There's a 9-link version (longer chain between the cuffs) that can enable the user to secure up to 3 bicycles. Not cheap, but the peace of mind and sturdiness of the locks make it worth it.