Tire: Potenza RE050 RFT
Category: Max Performance Summer
UTQG (treadwear): 140 AA A
Not too much of point for me to go into a lot of depth on this tire, it is essentially just a run flat (hence, RFT at the end) version of the Potenza RE050 which we have already reviewed. The only thing I would point out, is that this tire was developed exclusively for Audi, BMW, Maserati, and Mercedes-Benz vehicles, as opposed to the vehicles listed in the review of the original tire.
As with all summer tires, they are not intended to be driven in near freezing temperatures, or on anything resembling snow/ice. Also, with run flat tires, Bridgestone recommends using these in sets of 4, since the handling characteristics vary slightly between the run flat and non run flat versions. It's a bit hard to quantify exactly how they differ though, so I'm guessing this is probably more of a safety precaution.