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993 wheel size and clearance

Wheels and Tires

Vehicle Information: Year: 1997; Body Type: Coupe; Total Mileage: 30,000;

I want to lower my 993 C2 coupe to Euro spec's with a Bilstein PSS-9 suspension package. Presently, the car is equipped with factory 17" cup wheels. I'd like to install 18" wheels one inch wider (8 x 18) front and (10 x 18) rear.The offset on the OE wheels is (17) 55F 55R and (18) 52F 65R. 1. How rigidly must I adhere to the offset criteria?2. Is there adequate fender to wheel clearance with the car lowered and larger width tires?

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