Nah i dont, i use a cheap U Lock and cable. But stopped using it when i park at work because of the high security there. Use the u lock when at grocery store or somewhere other than work. But ive been looking into getting a really cool alarm/pager system installed and also a big chain. But anyways, if it makes you feel any better, on the way to work for over 2 months, ive passed these two agility 50s just parked in the street with what seems like nothing on them and they are still there. In a rough neighborhood too lol. Ehh that probably doesnt help.....?