I was about to install my winter tires when I noticed that one of them has developed two small bubbles in the sidewall since I stored them in spring.
I would just replace it with an identical unit but, unfortunately, it's a discontinued model (Michelin Pilot Aplin PA3) and I cannot find a proper replacement anywhere... which sucks, because they all have excellent tread life remaining.
I'd like to avoid replacing them with a brand new set, due to the expense. The newest iteration (PA4) isn't made in the same size that I have (235/45r18).
Since it's on a RWD car with factory staggered setup, I've considered replacing just the fronts with 225/45r18's or the rears with 245/45r18's in the PA4. Alternatively, there are other brands available in the 235/45r18 size that I already have.
I know TireRack et al claim never to run different tires together (or even different wear levels) because of safety concerns. How much of that is company CYA and salesmanship and how much actual safety concern is there for an attentive driver?