Quote:
Originally Posted by mjr24
This is ridiculous. The star tires are just their way of getting you to buy “special tires” that are ridiculously high priced and wear out fast.
It’s akin to when a dealer says only they should change your oil and no one else.
There is zero difference between star tires and normal non-star tires…..at least not one that you or I will ever notice.
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This is incorrect. You merely have to feel the outer corners of the * spec vs the non-* spec. It has a different composition.
Quote:
Originally Posted by user12464
FWIW BMW uses non star spec Continentals at all the M school cars driven on the track (including the X-Drive M5). They then go on to sell the school cars as CPO. So clearly even BMW doesn't think star spec is crucial.
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BMW uses Continentals on M School days because they sponsor the M school. If you go to a non-M School, like teen car control, you will see Michelins. But you are right, they are not "crucial". They are, however, more ideal for what BMW was trying to accomplish out of the factory.
Quote:
Originally Posted by M5Rick
On rear drive M cars it doesn't matter one iota if you have a star or not. I have Porsche designated summer 305 PS4s's on my rears and I'm happy.
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It does not matter on AWD vehicles either. You just have to run the same tire diameters on all 4 corners.
Quote:
Originally Posted by BMWbiker
Just to confuse things a bit more, the G26 M440i x-drive GC comes with:
19x8.5, 245/40 R19 front
19x9.0, 255/40 R19 rear
This is more than a 1% difference in diameter.
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The difference is 1.18% or 0.315 inches. Some source say 2.5% is the max. I've heard 1%. Are there problems with this setup in the M440i?