If some of you have been postponing your investment in a good bike lock, this report we received from a reader, Christina, might persuade you to hurry up. Christina says that she and her boyfriend are lucky to still have their bikes, but it’s because they “practice good bike security.” Here’s what Christina wrote in an email:

“I just wanted to alert you to an attempted bike robbery at 45th and Osage last night. My boyfriend and I had locked up our bikes to a stop sign before going to a friend’s Chanukah party at around 8:30. When we left her house at 2, our bikes were all tangled up, pulled around the stop sign and out in the road a little bit. My front wheel and spokes were bent by my u-lock, my hand brakes were bent backwards, and my seat slashed. My boyfriend’s derailer was bent, but he claims it actually works better now than it did before. We’re lucky because we had locked up our bikes securely and we had good locks– for the damage and frustration, at least I still have a bike. I just wanted to alert my neighbors, because even though bike theft is pretty common, I think it’s always good to have a reminder to practice good bike security, especially when we live in what appears to be such a generally safe neighborhood.”