Last night running at the Moto Arena for 3 hours I ran a set of foams trued to Losi wheels that were excellent and lasted really well (and they were trued up to look like full sized buggy tyres and not make the car look cack) and I also ran a set of used Ballistic Buggy Greens which got better as the spikes wore off. These would easily last a whole meeting if not two before they were destroyed and you could obviously use tyres that were past their best that you'd normally be acetoning. The important thing would be any jumps would have to have a really long landing ramp as landing on the tarmac is a big car breaker