Run Flats or a Spare or Both?
My 2015 X5 Diesel has Pirelli Run-Flats. Compared to my Z51 Vette's runflats, they are a marked improvement. I see no need to worry about the technology. It has been proven to my satisfaction with the Vette. The Pirellis are quiet, stick as good as you need if you like to toss the X5 around corners or in avoidance maneuvers, and do a fine job in the rain. Don't know about snow with these, as Texas doesn't see much if any here. Save your money and a lot of space and just let the Run-Flats do their job.
Amanda
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