any lightweight 18's for this car?

|samu · 07-26-2012, 08:57 AM

Quote:

Originally Posted by DR_

20's won't give you more contact patch and will be heavier. The size of the contact patch is a function of weight and the PSI. Diameter and width only change the shape of the contact patch.
Typically, for best performance, you want to get the smallest diameter wheel that can fit over your brake package.

Wow,no

DR_ · 07-26-2012, 09:21 AM

Quote:

Originally Posted by |samu

Wow,no

First off wheel diameter is irrelevant. Tire diameter is relevant but mostly only to the shape of the contact patch, not much to the total size of the contact patch. Do some research before calling me out or at least link to your sources.
There are some other smaller factors involved like tread design and softness of rubber but for the most part the total size of the contact patch is determined by the weight and PSI.

from wiki
Statically, the size, shape, and pressure distribution are functions of many things, the most important of which are the load on the tire and the inflation pressure:

The larger the load on the tire, the larger the contact patch.
The larger the inflation pressure, the smaller the contact patch.

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