Quality car tires are hard to beat. They run the coolest of any tire. And the treadwear will last the longest. Just make sure the carrying capacity is rated above and beyond the actual weight carried.
If the dolly is of a rigid design like Acme, the tires will not last as long as any steerable wheel dolly.
Rich
'01 31' Rexall Vision, Generac 5.5k, 1000 watt Honda, PD 9245 conv, 300 watts Solar, 150 watt inv, 2 Cos 6v batts, ammeters, led voltmeters all over the place, KD/sat, 2 Oly Cat heaters w/ ox, and towing a 2012 Liberty, Lowe bass boat, or a Kawi Mule.