[BTC Maxi]

I have a Xdrive M340i and currently am running 225 run flats all around, it's time to replace them and I am wondering what would be the best tire setup to run? I've been looking at Michelin PS4S's but don't know what sizes I should run. Any help would be appreciated!

[marco000]

The maximum you can go is 245 on the OEM rim.

I'm not entirely sure how different 245 will be comparing to 225
for daily drive.

[malibuboats91]

I've been debating this as well. Many do 245/40R19 all the way around, but I've heard of some rubbing. After months of going back and forth, I pulled the trigger on ordering 2 OEM 8.5" rear wheels along with 225/40R19 & 255/35R19 PS4S this morning.

[G30M]

Originally Posted by marco000

The maximum you can go is 245 on the OEM rim.

I'm not entirely sure how different 245 will be comparing to 225
for daily drive.

more grip, better turn in, less bumpy (higher air volume)

the only downside is you have to pay for new tires, for the purist also -very slightly more prone to aquaplaning and very slightly less grip in fresh snow