Two of the disc locks are 16mm. Those won't be easily broken. And, if looking at quality, of course main locks of 16mm-19mm are better. But one of the 14mm disc locks could be successfully used instead of a 14mm secondary lock. There is a definite space advantage in using a disc lock instead of a full u-lock. And since the barrels are the same thickness, the level of security is the same, if not higher.
I'd always recommend a main lock of 16mm at least (normally), in conjunction with a secondary locks of 14mm (minimum barrel thickness).
For ultimate space saving and protection, a Fahg and a Nemesis would be hard to beat.
snottyotter, are you sure about that?
Two of the disc locks are 16mm. Those won't be easily broken. And, if looking at quality, of course main locks of 16mm-19mm are better. But one of the 14mm disc locks could be successfully used instead of a 14mm secondary lock. There is a definite space advantage in using a disc lock instead of a full u-lock. And since the barrels are the same thickness, the level of security is the same, if not higher.
I'd always recommend a main lock of 16mm at least (normally), in conjunction with a secondary locks of 14mm (minimum barrel thickness).
For ultimate space saving and protection, a Fahg and a Nemesis would be hard to beat.