An integrated motion-sensing alarm that chases off jokers who think they have a right to move your bike, and also lets parallel parkers know, “Yes you did make contact with that motorcycle in the rear view mirror, and if you keep going you’ll knock it over.” It’s even the perfect size for pitching at the heads of people who mouth off - it’ll be right in your hand during the time after approaching your bike and before riding away - when everyone seems to think they have the right to talk to you. (For some reason the pacifist Europeans who designed Xena didn’t put this valuable information on the package...) Xena’s 110db screamer also keeps you from charging off with it still shackled to your disc, avoiding embarrassing smashed calipers and summersaults. She’s a simple alarm and a sturdy lock that wards off evil and gives you peace of mind. The smaller XR 1 has a 6mm pin, 3.2"×2.3"×1.3" 1.32 lbs., and the larger XE 15 has a 14mm pin, 4"×2.5"×1.3" 1.99 lbs.

Disc Lock Comparison Chart