Another curious question

[Removed user as requested]

I have been told that the ideal wheel size for a handling car is 17" on all 4.

Tests have been made on same car and same driver with smaller than 17 and larger (like 18-19).

Though you can fit 14" brakes on an 18" rim vs a 13" brake on a 17 the tests showed that the car with the fastest circuit times was with 17" wheels.

This means anything smaller or larger than 17 = compromise.

My question now is...

If that be true (i checked a lamborghini diablo they use 17s on all 4 also) why on earth every single pro-touring car I ever seen or read about runs 18 on the rear and 17 on the front or 19 rear 18 front or 18 all 4 but never 17 all 4?

Am I missing something here?

I know you can run 335x17Z on the rear... why does everyone go larger than 17 when 17 = Ideal?

Is it because you cant get 17x13 wide wheels to make the 335s the ideal fit but they can be gotten in 18" size? Or what?



George