Originally Posted by Retro Grouch
A big bolt cutter, the bike thief's weapon of choice, will cut right through that cable.
Have to take issue with that characterization, RG. The lock he's contemplating has a 20mm (0.79") diameter cable. It would take a very large and VERY sharp bladed bolt cutter to defeat a cable that hefty; and it would still not be easy. Anything less would just mash the cable and accomplish nothing.