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      01-14-2020, 06:28 PM   #29
Anthony1s
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Drives: 2018 Mineral Grey M2
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Quote:
Originally Posted by Expert@ApexRaceParts View Post
That is not entirely true. It is important to note that most high performance summer tires and most R compound tires do run much wider than "advertised". A 265mm wheel on a 9" wheel can bulge quite a bit and is not ideal, a 265mm tire will fit much better on a 9.5" wheel. The same can be said for a 10" wheel with an aggressive 285mm tire.

If the tire brand and compound are on the aggressive side, fitment and performance would be impacted when compared to running the extra 0.5" of wheel width to give that extra bit of sidewall support.

- Max
No, you are entirely not true. So provide proof and your "quite a bit of research on this subject". Because extraordinary claims require extraordinary evidence.

The fact is, in my personal experience RE71R and Sottozero Serie II do not bulge the OEM wheels. That being a 265/35 on the front 9" and a 285/35 on the rear 10". The sottozeros that I have are actually slightly wider than the RE71R too.

Additionally, both everyone in the forums and tire shops agree that 285 is perfectly acceptable for a 10". Can't actually find anyone who says a 295 or 305 isn't okay, actually, either. So if you want to go against tons of different people who have tested multiple tires on the 437m wheels, as well as multiple tire mfgs and retailers that say 285 is fine for a 10" wheel, the provide proof. Otherwise, everything you say is marketing nonsense to sell wheels, in my view. Which does an incredible disservice to the community and the people who believe you because they don't know any better.

https://f87.bimmerpost.com/forums/sh...2&postcount=23
https://f80.bimmerpost.com/forums/sh...&postcount=199
https://f80.bimmerpost.com/forums/sh....php?t=1349434
https://f80.bimmerpost.com/forums/sh....php?t=1421086
https://f80.bimmerpost.com/forums/sh....php?t=1414210
https://f87.bimmerpost.com/forums/sh....php?t=1464923

Additional evidence:
Absolutely every tire mfg on tirerack reccomends a 9.5"-11" wheel for their 285/35 tire. And some even recommend 9" wheels
https://www.tirerack.com/tires/TireS...earDiameter=17

Absolutely every tire mfg on tirerack reccomends a 9"-10.5" wheel for their 265/35 tire. And some even recommend wheels as narrow as 8.5" and as wide as 11" for their 265/35 tires.
https://www.tirerack.com/tires/TireS...earDiameter=17

https://www.tyres-pneus-online.co.uk...ce-advice.html
https://www.tyresizecalculator.com/c...rim-size-chart

This isn't just a BMW thing either. Every single Porsche, Mustang, and Corvette forum sees no problem with a 285/35 on a 10" rim, some cars even come from the factory like this, and say even wider is fine.

So two things you have to prove here:
1: A 285/35 bulges out of a 10" wheel, or a 265/35 bulges out of a 9" wheel.
2: That the amount of bulge negatively impacts handling and is dangerous.

Otherwise everything you are saying is hogwash.

Last edited by Anthony1s; 01-14-2020 at 10:12 PM..
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