Re: How do you protect your bike? I just use a big heavy chain that I found for 15 bucks at walmart with a padlock. http://www.walmart.com/ip/3-8-Anti-Theft-Security-Chain/16781333 I used an old inner tube to sheath it so it won't scratch up the bike, which as far as I can tell is equal to a $60 bike chain but for way less money. Obviously, if someone really wants to steal it, they're going to, but I like the look of a big heavy chain. Also, just for fun, I cut one link off the end with my dremel, and it took me 35 minutes and three cutting wheels to get through it, so I feel pretty good about it.