[Willy Sea]

So we recently bought a set of Apex EC7's in 18x8.5 ET35 and 9.5 ET35 and run them on our 3.0si coupe with the standard 225/40 and 255/35 sizings. Very happy, fill the arches nicely with 10mm spacers front and rear.

With a Z4M coupe on the horizon and the pricing offered think we will further bolster the US economy with the purchase of a set of ARC8's in 18x9 ET30 and 18x10ET25, and fit standard sized 224/235/45 F and 255/40 rear tyres.

Naturally the ability to swap the wheel tyre combos between the two cars is attractive, and my questions are:
Is 9 inch just a tad wide on the front for the 4M, and with the EC7's on the 4M will I need the spacers too, maybe on the front but not the rear?
No plans to lower ride heights etc or fit coilovers.

Couple of cellphone pix, colour is nachblu.
Thank you for reading, all advice taken on board,
Bill