Rubber tires. Spring suspension. Rough size is about 10-12 long. About 5-6 wide. I used for a miniature team of ponies but is plenty big enough for a full size team. Or even one full size horse
Has some boards that need replaced but all in all should be well worth the money. I took the canvas tarp off the top as it was junk but everything is there, just need to add tarp if you want shade.