How often do tyres have to be replaced, and how much do they cost?
A typical racer will get between 4 and 6 race meetings per set of tyres. This means that the average racer competing in a 6-round state series will be able to do a full season of racing on one set of tyres. A more serious racer who will race more often, and wishes to have softer rubber on hand may use 2 sets of tyres for a full season of racing. Tyres for 2006 are in the order of $1000 per set.