The reason I resurected this thread? The origonal question was never realy answered and I was searching for the same answer. I bought a U lock and a large braded cable key lock. One problem I have is that there are no bike racks where I work and I have to tie to a tree outside the door! Cable cutters will indeed make short work of cutting, because that is what they are designed to do. I'm still looking at getting a noose type chain and leaving it on the tree at work. Maby this will prompt the administration to put in some real bike racks! I was just dumb founded at how easly the combonation lock was defeated with no tools of any kind and was wondering if the key lock mechenism would be a little more sturdy.