Originally Posted by
MTBerJim
My concern is more when I use it for running to the store for a loaf of milk. Chains-Cables-U locks. What do you use and how do you store it?
Is that over by the gallon of bread

?
Seriously though I use an onguard mini U lock. Basically whatever lock you use is better than using no lock at all. I had the onguard brute, but it was to heavy and bulky and I didn't like carrying it around.
I carry the mini using a twofish bikeblock on one bike since the carrying bracket it came with sucks. On the other bike I toss it in my rear basket.