National Staff Greg G. Posted November 18, 2022 National Staff Share Posted November 18, 2022 Tire Size: DOT-approved: NASA Section Width 266mm or smaller = +0.6 NASA Section Width 267mm to 282mm = +0.3 Tire size printed greater than 315 (ST2, ST3 Only) = -0.3 We haven't decided if we keep the non-DOT number the same at 11.8"/300 yet. As of now, this still applies to both ST2 and ST3. Don't forget that there are pretty huge weight Mod Factors that already help heavier cars. 6 1 Quote Link to comment Share on other sites More sharing options...
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