Originally Posted by EChing

In addition to a Kryptonite and On Guard u-locks, I have a Planet Bike Mountie mini u-lock. This is about the size of my palm and weighs about a pound. Best way I've used it is to lock it around a seat stay and a bar of the thinner kind of bike rack.
There's a picture of this in the Reviews section:
http://www.mec.ca/AST/ShopMEC/Cyclin...ini-u-lock.jsp