I received a PM about this so I figured I would share the info in case it will help others....
Well seemingly the various tires I was interested in didn't give me a perfect, staggered matching set I was looking for with slightly taller front and rear as well as slightly wider rear.
So I ended up with doing the following:
Front 245/40ZR20 (27.7d x 9.6w) - Mich Pilot Sport A/S 3+ BK XL
Rear 285/35ZR20 (27.9d x 11.2w) - Mich Pilot Sport A/S 3+ BK SL
I had the stock Mich Pilot Super Sport:
245/40ZR20 (27.7d x 9.6w)
275/35ZR20 (27.6d x 10.8w)
Front is same as stock M.PSS
Rear is close to same diameter as they are both 35s. But they are a hair wider. So calculator comes up with 27.6 dia (stock) vs 27.9 dia for the 285/35.
The fronts are 27.7 dia.
So that is very close and well within 1% spec. I didn't/don't notice any issues.
Actually the stock setup has the rears 0.6% shorter and my setup has the rears 0.6% taller.
Here is some info about the 1% thing:
https://f30.bimmerpost.com/forums/sh....php?t=1142647
I also bought spacers (15mm and 17.5mm), but yet to put them on, for some reason. lol
No photos, and its raining snowing at the moment and BMW is out in it or I would take a couple real quick. But they are still pretty far in, hence the desire for spacers. lol
I do really like this tires though. I was really torn between these and the Conti's. But size compromises, etc.
I was afraid they would be too stiff in the Sport setting on the M40i suspension. But I don't think that is the case and if I remember correctly they are a little softer then the M.PSS that were on it. But its been a while.
Hope this helps...