HA! If you want a chain lock, I've got the best one! I ordered, sight unseen, a highly ranked, security approved, fancey schmancy Onguard Beast. When it came in, I was shocked! That sucker weighs 10 pounds!!! My mountain bike only weighs 28 pounds! What was I thinking? People laugh when they see that "motorcycle" lock on my baby, but hey, it's not going anywhere!! Oh, by the way...to transport it, you have to ride with it around your waist. If you wrap it on your bike somewhere you might tip over....