snoops, those chains might not be too bad, but so that no-one gets confused, I'm making sure that this thread is about locks that don't do much in the way of compromises.
Minimum "safe" standard, as per this thread, is 16mm for U-locks (with one exception), and 16mm also for chains. Those cheap Oxfords you mention are probably nearer 10mm, so definitely not recommended, as they can be quite easily cut by bolt-croppers.
snoops, those chains might not be too bad, but so that no-one gets confused, I'm making sure that this thread is about locks that don't do much in the way of compromises.
Minimum "safe" standard, as per this thread, is 16mm for U-locks (with one exception), and 16mm also for chains. Those cheap Oxfords you mention are probably nearer 10mm, so definitely not recommended, as they can be quite easily cut by bolt-croppers.