New F15 is expected by the end of the month. It's coming with 19" wheels. I have the choice of keeping one set of wheels from my E70, the OEM 18 inchers or another set of 19's. So now I know I'll need to get new TPM sensors. So aside from condition, is there a compelling reason to use either size for the winter Blizzaks? Generally smaller is considered better, (and the price for 18 inch tires is considerably better as well) but I obviously have the opportunity to use the same size.