I just filled my tires with concrete. Now they never go flat. Of course it takes 4 of us to push them up the beach... but they aren't flat! <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />
I put about 8 ozs of repair goo in each tire, so about 1 pound total. Since a bicycle tube can weigh close to 0.5 lb, I would guess installing the inner tubes would add at least 1 lb and probably closer to 2 lbs.
John
