The tubed tires look good and the valve doesn't leak. I have to fill one with air every time I take it out. I don't have a bike pump that works currently, and what good is an air compressor if there's no electricity. Anyway, in the interest of reliability and laziness, is anyone familiar with a foam or something that can be pumped in the tires? I've heard of farmers doing it to their tractor tires, but not sure where to look. Thanks.