I've got 245's on mine. 18" wheels. Michelin Pilot Preceda. Great tyre, just coming up to 2 years and 40,000klms on them and looking to replace now. Got a quote of $480 per today. I've got 235 Falken semi slicks for my track days and they are great as well, so personally, I don't see any big difference in 235 V 245, but I want 245"s if that makes sense?