land Yatch racing Posted June 14, 2022 Share Posted June 14, 2022 Since the st4 championship is a spec hoosier event this time. If it rains, which I assume could happen in sep, will we be required to use hoosier rain tires, or if it rains can we put on other more cost effective rain tires like a michelin 4s? Quote Link to comment Share on other sites More sharing options...
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