Does anybody know the difference in contact patch size between the zhp and zsp wheels?
Edit: using OEM tire sizes.
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Does anybody know the difference in contact patch size between the zhp and zsp wheels?
Edit: using OEM tire sizes.
oddly enough I believe the ZSP tire sizes are
225/45/17
245/40/17
and ZHP is
225/40/18
255/35/18
Why the rear isn't 255/40/17 to keep ratios is beyond me.
Ooooo I found an automatted calculator.
http://bndtechsource.ucoz.com/index/...alculator/0-20
According to my numbers and their calculations, the front wheel on the zsp has a slightly larger contact patch, unexpected. The rear contact patch on the zhp is slightly larger, as expected.
Actually it also even varies from manufacturer specs. :)
Contact patch sometimes measured as tread width but since most contact patches now are more rounded, its hard to say when the actual start of the contact patch is. There is no standard on how to measure tread width. The only thing you can really measure with a standard is section width which is the length from the edge of inner sidewall to the outer sidewall. This doesn't really give you what the contact patch is though..
Tread width comparision..
255/35/18
Dunlop star spec II , tread width 9.6"
Bridgestone RE11A , tread width 9.4"
Hankook RS3 , tread width 9.5"
pulled from Tirerack specs.