I have a question about street class and wheel diameter. I know you can go up or down 1” in diameter from stock and stay in street class, but does trim level matter? For instance my RX8 is the R3 trim level which has 19” wheels, but all other RX8 trim levels have 18” wheels. In the SCCA solo rules they make no distinction between years or trim levels of RX8, so could I run 17” diameter wheels and still stay in street?