Rolleze are somewhat repairable with parts available.
But I'm talking about real rubber tire CatTrax with rust-hole leaks in the steel inner axle inside the rubber tire. You have to take them apart to see the problem.
Also does anybody know what the rubber filler valve looks like inside? Does it just get sand in it and then a slow leak? This is a kind of nuisance too: Needs a football needle to fill. I put in a permanent heavy duty one.