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[MrKevinRosales]

With spring coming up I thought it be great to finally get some MPSS to replace the OEM Runflats. Looking through the forums I was on the fence about tire width and whether or not i'd be going up to 225 & 255 when I came across the Star Spec MPSS.
Is there any noticeable difference? Also is there any adverse effects of mixing star spec and non-star spec? It seems that there is only 225-40r18 and 245-35r18 available in star spec so it would have to be a mixed set if I did want to go with these.

[gregthegr8]

I went through this same dilemma recently to try to figure out if it's worth getting the bmw star spec tires. After a bunch of research and getting some info from an engineer at Acura who worked on the new NSX who strongly urged to get the bmw star ones, I would highly recommend doing it. Usually it's about $10 more per tire, but bmw requires the tires to be grippier and be a little more performance oriented. Take a look at this article as well to see if that convinces you.

http://www.popularmechanics.com/cars...-same-9890716/

The only crappy thing is Michelin never made the stock 215's in bmw star variety, so you're either forced to go with 225/245 or 225/255 to have them all be bmw star ones. They make 255s in star variety though. I believe I've seen them on tire rack.

While wholly anecdotal, I did go from non-star PSS to stars in the same sizes on the rears and the car surely felt a lot better, though that could just be attributed to having new tires vs stars vs non-stars. Though hmm, I just looked and don't see the 255s anymore in bmw variety on tire rack. They should exist though.

[MrKevinRosales]

Thanks, that was worth the read.
I just have to find a pair of those 255's for the rear and i'll be all set