just bought oem m5 166 rims and the 255/40 is rubbing up front....dealer will take them back. Now just to confirm, I need to buy a 245/35/19 correct? Not 245/40/19. do both work?

Why is the stock M5 sold with 255/40 and 285/35 when it appears most of you use245/35 and 275/30.

BTW, the 285/35 on the rear work well, no rubbing.

Thanks!

 

Apparently, the M5s have more room in the wheel well. I suppose BMW did this to fit bigger rubber to a more powerful car. Therefore the bigger tires all around for a larger contact patch.

And yes... the 285/35R19 tires in the rear will work without rubbing if you have the 166 M wheels with the M5 ET 28 offset.

As for the 5 Series that are not of M caliber, the factory recommended size for a staggered set of wheels/tires is 245/35R19 for the front and 275/30R19 for the rear. This avoids any potential rubbing of tires to car body parts and retains the original factory set wheel/tire diameter to keep the speedometer accurate to factory settings.

Here is a tire size calculator that you can use to find the proper size tire for any car.

http://www.1010tires.com/TireSizeCalculator.asp

 

M5 fenders are wider...hence the different tire size...


Glad to hear your 285's fit, rub free...

 

No problem keeping my 285/35 in the rear with the 245/35 up front right?

 

Shouldn't be a problem.

 

Not a problem from a rubbing standpoint, but the circumferences of the rear tires won't be ideal. The rear tire will be a bit taller than the front one, hence the use of the 275/30 in the rear. And it could affect your speedo, however the speedometers aren't accurate now, so yours will probably be MORE accurate in actuality with the bigger 285's.

It's also a looks issue...with higher rubber on rears vs. front. I am sure it will look fine, though...maybe even better.

 

245/35 + 275/30 is the OEM sizes for 19" staggered on non-M5's. However, as your 285's are working fine just put on the 245/35's...