I use a 7" mini, use the Sheldon method, and go through rear wheel, fender and post. I do not have quick releases on my front wheel, and usually don't bother locking it, but if I am leaving the bike for longer than usual, or in a sketchy part of town, then I have a cable which goes through the front wheel as well as the U lock. I have a knit sleeve that goes around the U to keep it from scratching up the frame.