The North Central region is a bit weird because the grids have been very small and it's tough for a vendor to cover even the gas money to get to the races. Trackside tires was covering Nelson but I'm not sure if they will again this year. Here's 2 contacts to ask your questions to. [email protected] or [email protected] Another thing to consider is if the grids are small and the contingency program has min. size requirements which most do contingency may be out of reach, then factor in the cost of tires, as some are more expensive than others.