Not that senior.
Join Date: Mar 2011
Location: Sydney Australia
Why the need to change sizes?. Engineers take a lot of things into account when deciding on a specific size tyre for a bike, or car for that matter.
Rim size. contact patch, and the downforce applied to that contact patch, are just a few, so why second guess an engineer that has years of experience, and put another size on?.
Change brands, yes, experiment with tyre presure's. sure, but change size...why?