Tansar_Motorsports Posted June 10, 2020 Share Posted June 10, 2020 Hi All, I am preparing a Mazda RX-8 for TT5/ST5 competition. 200 WHP approximately. 2900 lbs approximately For dry tires, I will be running 245 R7's on 17x9 wheels (the common setup for other RX8 racers, and confirmed to pass the tire width test). Question: For rain tires, should I run the same sizes, or should I run a slightly narrower tire and/or wheel? (225's on 17x8 wheels for example) Quote Link to comment Share on other sites More sharing options...
dwesterwick Posted June 14, 2020 Share Posted June 14, 2020 I'm certainly no expert in the rain, but since there haven't been any replies yet I'll pitch in my two cents. I think this will depend on the tire you plan on using in the rain. I skimmed through the rules, and it looks like you can use a Hoosier H2O. I assume that's your plan? If so, I'd still get them close to your width limit. They're really soft and actually get warm from my short 15-min TT sessions in the rain. I think you'd want to get them as wide as possible so they're less likely to overheat if it starts drying up in a race. Quote Link to comment Share on other sites More sharing options...
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