re: the Sheldon method. I had a bike stolen a whole bunch of years ago. I friend found it locked up on the street at Huron and Dupont. He put his own lock on it...left a note for the ****** that basically said the owner of the 22' mtn bike is on his way to retrieve it...and came and got me. We headed back up and whe we got there the afforementioned ****** had un-locked the bike but put his lock around the back rim/tire. Not content with allowing this assclown to get my back wheel (old Campy Euclid hub on a Bontager custom ma-40) I strolled down the block to the Stevensons rent-all...borrowed a hack-saw...and sliced through the tire/rim/tube in about 30 secs. once cut it didn't take much to spread the rim apart enuf to pull the lock out. Moral of the story is this method is not really all that secure. Use the good lock to lock your frame always...use a secondary cable if need be.