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Discussion Starter #1
I am planning on upgrading my wheels and tires on my GT350 to new ForgeLine 20 inch wheels with 305/30-20 fronts and 315/30 rears Michelin Pilot Sport 4. Has anyone out there gone to this wheel and tire setup? The rolling radius on both of these tires is almost exactly the same as the stock 19 inch Cup 2s that are now on the car, so no gearing or ride height issues
 
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