Quote:
Originally Posted by CanAutM3
In the 992 does have significantly larger diameter tires in the rear. But that can be achieved without having a larger diameter rim. The different rim sizes are used to alter sidewall height.
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It can with different tire profiles but again he did state the larger contact patch as an explanation to why they had staggered wheel sizes.
They wanted more contact patch and likely tried all options as wider wheels, more profile at the same wheel size and larger wheels and the best overall results were achieved with larger wheels.
I don’t think the main target was a lower profile rear tire instead it was a larger contact patch. The sidewall was likely just tuned as a secondary parameter.
For the G8X we haven’t gotten a detailed explanation to why it ended up were it did. Your guess is as good as any. I think mkoesel is close to the truth that this is more an empirical result of testing than a formula based decision.