The rubber tires tend to sink in the sand, where the Wheeleez tires roll on top of the sand. Wheeleez tires are really pricey because they really work on sand, super pliable and about 2 or 3 PSI.
The bid issue with anything on the sand is weight; don't the cart with anything you don't absolutely have to have that trip!
I have a couple Wheeleez Beach Carts and they are great, but like anything else, the more you load it, the harder it is to pull in the sand.

