The only option in 285 of the PSS is 285/40 19 which I doubt can be a good fit. So, till Michelin releases new sizes, for the rear of 1M available options are stock 265/35 19, 275/35 19, 275/30 19 and if it can be fitted (am curious to know as well) 295/30 19 assuming you stay with 19 inch wheels.
I am with stock size PSS, I left the stock PS2s as a reserve set just after 550 kms. and am very happy, no tracking though so I can't comment on the reported loss of turn in compared to PS2s, I noticed nothing that sort because for me it is basically street use, occasional highway and back roads. Can't think of anything better for the 1M. They do everything admirably good. Also, unless you are in racing or desire a wider look or you have a tuned car with significantly more torque, I think the stock size does good enough with the PSS, problem of traction basically cured after my swap.
Last edited by ozinaldo; 04-27-2012 at 11:10 AM.