I just read an article on this a few weeks ago. I can't seem to find it now though unfortunately. It very much went against the "wider is always better" line of thinking that I had always assumed. I'll keep digging because it really went into a lot of detail. If I recall correctly, with a narrower tire you don't lose that much contact patch but instead it elongates rather than widening (assuming the same psi). So then, at the same psi, the narrower tire on the same wheel will have tighter sidewalls and be more responsive.There are some on line articles that give theory and advice. A 235 on a 7.5 would be far from ideal. I have 215 40 on 17x8 rims on my Mazda 3 which is close to ideal. Could probably have gone another half inch wider with the rim. Steering response is amazing when the tire is not rolled outside rim width. I also have a Miata performance book which gives theory and examples of successful track rim and tire combinations. If I can find the book I will provide title and author.
Thank you sir for the knowledge base.This may be the article, How to PROPERLY select and size TIRES for PERFORMANCE - Page 2 of 5 - MotoIQ
I feel like I remember seeing more pictures about contact patch but this explains the sidewall preload some.