Originally Posted by
ortcutt
I don't understand this. Wouldn't a thief aim to cut the lock, and not the frame? If so, then nothing is gained by involving the seat tube.
That's exactly the point. By locking around a portion of the frame (be it the seat tube or seat stay or whatever) it forces the thief to cut the lock or ruin the bike. Locking just around a wheel means they can leave the (replaceable) wheel behind or, at worst, cut the (again, replaceable) wheel.