I like the idea of an alarm. But instead I decided to use common sense when parking the bike. I park in the garage at night. If not, or in town, I put on 2 cable locks, 1 for each wheel. I make sure that they run through the disc brakes. I also invested in a $25 bike cover from my local parts store. (what a thief does not see). All in all, remember that the bike weighs 436 lbs. Hardly a quick and easy theft..LOL. Most thieves are lazy and want a quick in n out. I´d say the weight alone puts them off. Of course if you want to park the bike in a dark alley after dark, there are no guarantees.....