It really depends a lot on the upkeep. If stores do no upkeep then in no time you end up with carts that all have one wheel clogged with hair and pulling the ca

It really depends a lot on the upkeep. If stores do no upkeep then in no time you end up with carts that all have one wheel clogged with hair and pulling the cart steeply to one side. With regular maintenance you have smooth running carts that don't have any directional bias and are a pleasure to use. A supermarket local to me had stickers for a while you could grab as a customer and stick on a cart if it had a stuck wheel. They'd then take that cart out for repair. They don't do the stickers anymore, but I figure they just keep on top of keeping the wheels running smoothly nowadays. Haven't had a cart pull to one side in years now.