Boxster vs Boxster S Brake Calipers & Rotors

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Originally Posted by Akie

Thanks for the valuable insight guys I really appreciate it. On a side note, disregarding weight is the optimum wheel diameter size for track cars 18"? Because I have noticed in nearly all the big sports car racing series they all seem to run 18" wheels. And I checked Michelins race tires and they only offer 18" race tires. Also every gt3 cup/R/RSR runs 18"s so if 18"s are optimal why?

The fastest Boxsters on the west coast are running 17" wheels. No problem sourcing race rubber and it is less money in 17" sizes.