This is the lock that I have: http://www.cheapism.com/bike-lock/39...5_bicycle_lock

The review here says it weight "just under tow pounds." I weighed it at the bike shop and it came in at 750 grams, which equals 1.65 pounds. I agree that its probably overkill for most kind of touring. Especially wild camping touring and small towns. I feel like I am likely to encounter a wide range of terrain and populations when going across a continent so I am just not sure yet.

Can you attach a picture of your lock? Is it a no name brand or does it have a website?