[Gypsyking]

Gentlemen,

First of all I want to thank you for all the knowledge that I have gained in last couple of months going over various threads concerning the F10 (5 Series). In a week or so I will be picking up a 2015 535i x Drive M sport that has 33,000 miles on the clock. This will be my first BMW.

The car comes with M434 wheels (8.5Jx20” Front & 9JX20” Rear). Currently it has 245/35R20 (F) & 275/30R20(R) Bridgestone Potenza RE050A tires. The tread depth in front is 8mm (10/32”) & 5mm (6/32”) on the rear tires.

I’m a light footed driver & would like to know how much life these tires have left in them? I’m considering Michelin Pilot Sport 4S as replacement in the near future. For the rear tires I would like to opt for 285/30R20 instead of the stock size. Would these tires fit without any problem such as rubbing? Additionally on account of the larger circumference, how much speedometer error am I likely to see? Besides how will a non-stock tire size (Rear) affect the AWD drive system if at all? There is also the option of Michelin Pilot Sport A/S 3+ which is an All Season Ultra High Performance Tire. How is your experience with these tires?

Thank you very much for your time & help in advance.