Quote:
Originally Posted by 9XI
My RSA came with 18s. They fit fine with spacers. However, the steering was very heavy. RSAs have no power steering and the 17s were made for that car. I put the correct 17s back on the car, the steering became very managable and the handling improved instantly. I think 18s are a bad idea. I generally don't second-guess the Porsche engineers. They seem to know what they are doing.
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Yes, many RSA race cars run the Porsche Cup electric power steering units for this reason. Why Porsche deleted the power steering on the 964 RSA is beyond me.
As I said before, if performance is what you are after, go look at the folks who race these cars, everyone now runs 18's.
Plus in some brands, tires in 17" sizes are unavailable, Michelin PS Cups come to mind.
Driving on the street is a whole other topic. There 17's are a good choice.
Cheers, James