My wife and I do a lot of yard/ garden work and we have four carts that it seems I put them away in the fall and all is good. Spring arrives and half the tires are flat and now won't hold air. They are the standard 4.80/4.00-8 tires. So every year I buy replacement tubes and it's a pain in the neck changing them. I'm gonna try something different this year and take them off the carts and lay them flat in the shed with no weight on them. I know they may lose air over the winter but at least they won't have the weight of the cart squishing the tire. Anyone else have to fight with these things? I know, I could go the long dollar and get flat free wheels but that's a lot of coin to dish out.