Quote:
Originally Posted by VIERsr
275/30-20 wheel has the same diameter as OEM 275/35-19, putting lighter 20" rims in the front we can have a better look and keep the same ratio F/R without adding weight, but I don't know how the lower sidewall only in the front could impact on dynamics.
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275/30-20 is 673mm
275/35-19 is 675.1mm
(Edit - corrected diameters)
CanAutM3 stated earlier:
Quote:
Originally Posted by CanAutM3
Most likely to reduce understeer. In general terms, a larger sidewall tire provides greater ultimate grip at the expense of handling response.
The same thing was done on the F8X M3/4[SIZE="1"]CS[/SIZE] and M4[SIZE="1"]GTS[/SIZE].
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So a lower sidewall would probably increase understeer all other things being equal.