There are lots of ugly problems with airless tires; another beyond the ones you mention is that servicing the wheel gets more difficult. A lot of Bobcats shippe

There are lots of ugly problems with airless tires; another beyond the ones you mention is that servicing the wheel gets more difficult. A lot of Bobcats shipped with foam filled tires and you virtually could not separate wheel and tire without chipping the tire away. These wheels + tires were also harder to get on and off because not the weight; on a road vehicle I'd imagine the potential increase in weight will also make balancing difficult to impossible.