We recently participated in the USAC D1 midgets series at Columbus Motor Speedway (pavement). Here is the tire bill for that race:

MG7 $159.06

MG5 $168.93

MG7.3 $187.55

Tax $34.80

Total $550.34

We actually bought four new tires but returned the fourth one when we encountered steering issues.

It's my understanding that these tires cannot be used for a National midget race.

ASAIK, there was no limit as to the number of tires that could be used to race for the evening.