[Warp Ten]

Originally Posted by hlothery

That won't work for me. My M550i has 20 inchers, and is staggered, 245/35R20s in front, 275/30R20s in rear. Until they make a ZP tire for that size, it looks as if my only option for Michelin is the Pilot Sport 3 ZP, which is new and there is very little information out there about it. Discount Tire does not even list it. I have a little time before I need to pull the trigger, unless one of my Goodyear F1's blows another sidewall. Thanks for the help, though.

You are right, but they do make a 285/30ZR20 in the A/S 3+ZP, which should certainly fit the rear. Could you switch to all four the same? I did that on my E60 535xi M Sport which originally came with staggered tire sizes. (The current '19 540xi M Sport tires are all the same size). When it was first time to get new tires, my service and parts guys at the Dealership where I had worked all said they went to four alike all the time for customers and it didn't affect normal handling. I never went back to staggered sizes and never noticed any bad driving characteristics. If you are tracking it might make more of a difference; not sure. I think that my 535xi had four identical sized wheels. If your front wheels are narrower than the rears that might not work with 285/30s; depends on the wheel width. But overall it might be worth exploring if you like the idea of the Michelin A/s runflats. I'd think TireRack could probably offer some good advice on this issue, as could a good independent tire dealer or your BMW parts guys. Just a little food for thought.--Bob