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Old 11-20-2013, 06:12 AM   #5
ZZT86
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When you change wheel/tyre package try to keep as close as possible to the stock rolling diameter as a big deviation will show up in car speed. Eg: stock GTS = 625.3mm, the size Dan mentioned above = 637.2mm so a greater OD of 12mm which is OK but anything greater than this such as 20mm or more will throw gearing out slightly & you will lose the safe 3kmh buffer in your speedo.

I would also imagine that sticker rubber would achieve faster lap times if simply just replaced with same size.
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