Ron56, When I bought my RXV it also had a bumpy ride. If your cart has hubcaps on the steel wheels I would assume you have the same issue I also had. I bought some new alloy wheels and new tires and it corrected the issue. I bought the wheels and tires from Town and Country as they had them on sale for $400.00 a set. It is a shame such a nice cart comes with wheels and tires that is marginal at best.
Possibly the cart you test drove had a set that rode true or it was not on a smooth rode like in the Villages. If the cart had the same set you have on it might have been a bad test drive with tires that felt out of round. I had the same concerns you did after a couple of spins in the Villages. The original wheels and tires might have worked offroad, but on the streets they felt like they was out of round. I could not visualy see the tires wobbling but that is what it felt like. I would ask Town and Country about a upgrade on the original wheels and tires.
Other than the original wheels and tires I love the cart.
I hope this also corrects your carts issues.