I apologize up front for not being able to find the answer using the search button but here it comes anyway.
I have another set of 19" rays wheels which will be for the track alone, but I must drive them to the track as well. I want an R compound as opposed to my ZR Michelin PSS which lose quite a bit after 10 track minutes. I love them everyday but at the track they suffer.
I have heard of others running 265/285 front/rear as stock sizes seem to not be offered in R compound.
Price is not my issue as I only get between 6-7K miles out of a street set anyway at big bucks too.
I would love some help from experienced Z drivers.