What is the best rim size and tire deminsions for a 2000 ssei to get the best performance out of the car

I'd say stock for the street, but what are you trying to get out of the car? Are you a taking it to the track often?

i wanna build up the motor to race at the track but i still wanna have it street legal. where i live we have bad weather so i will only b useing them in the summer and when i go 2 the track im keeping the stockers for winter

Buy all-seasons in the stock size when you wear yours out, and buy track tires for the track.