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We Agree! 315 instead of 305

Greg G.

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  • National Staff

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. 


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