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      09-26-2015, 12:13 AM   #20
Flying Low
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Drives: 2002 M3, 2003 M3, 2015 M4
Join Date: Jan 2015
Location: Santa Rosa, CA and St George, UT

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Quote:
Originally Posted by M4ymb View Post
Issue you may not thought of

18 inch tires in a 30 series do not have a load rating to carry the forces the Mcars produce.

Weight yes but not weight + lateral G's + HP combo. Even those hoosier slicks are for a lighter car.

You'll need a 35 series to be safe running at high speed corning. Main issue is the higher RPM's the smaller tire turns creates heat and you don't want excess heat in a tire with load on it.

Take some time a pick the right tire combo.
Please provide a link to your source of information. I'm always interested in safety. So far so good after 5 track days on these tires with speeds up to 155 MPH, actually less because of the smaller diameter. Pressure rise from heat seems normal. Thanks
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