Post by
Mettler »
https://forums.nicoclub.com/mettler-u36299.html
Sun Jun 21, 2009 4:49 am
I read an article about this some time ago... it said it's not so much about tyre width, as contact patch surface area.
The weight from that corner of the car acting down on the wheel doesn't change... and by widening the tyre, you reduce the length of the contact patch, making it wider across the surface of the tyre.
In cornering, when camber changes and weight shifts off the wheel, you can imagine this strip of contact patch narrowing to a small area, as opposed to a narrower tyre where a more elongated section of contact patch would theoretically remain.
Basically, there is an optimal width tyre for each application, taking into account the other factors such as weight and suspension geometry. Once you go wider than that you are changing contact patch shape during cornering, but with a less optimal result.
This is also dependent on suspension settings of course. Will try dig up the article, it was a good read!