My 2 year old cart stopped working. After a week of correspondance it was determined my back wheels had to be repaced. From the website I ordered wheels, only to find out the were the wrong wheels and had to be sent back at my expense. I ordered another set of wheels, and when I received them they were different than the original set on the cart. I was told they were correct and I needed to sand and grease the post of my cart to install them. No one said the new wheels were much tighter than the old ones, after applying a lot of force they went on. I should of been told the new wheels were different, it would of saved me a lot of worry. It took me 3 weeks to replace the wheels.