It's no secret the wheels on the BMW aren't exactly hellastance fit: "More tuck than Caitlyn Jenner" has been used to describe them. So I want new ones, however before I push the button can I just run a sanity check past you all please? Long post ahead...
Current wheels:
18x8.5J ET45 all round, 245/45/18 tyres
25mm spacer on the front (so essentially ET20)
30mm spacer on the rear (so essentially ET15, extra 5mm needed to clear new suspension)
Wanted wheels:
18x8.5J ET25 front 245/45/18
18x9.5 ET22 rear 275/40/18
Now, on the current setup if I take a straight edge from the tyre lip (two points of contact, top and bottom) to the arch lip I get the following:
10mm gap at the front
15mm gap at the rear
In theory then, I can come out an extra 10mm at the front and 15mm at the rear, yeah? So I could run the following:
18x8.5J ET25 front with a 15mm spacer (so ET10)
18x9.5 ET22 rear with a 20mm spacer (so ET2)
HOWEVER
I'm now wider by an inch on the rear, so according to here they would stick out 25mm more than before. Basically, 10mm more than I have space for.
For those that have experience, is this something you can overcome by raising the car (temp solution), arch rolling, or even by running more camber? I run very little at the rear, the tyres are pretty much stood upright. If this isn't doable, then I'll just run 8.5J all round and accept I can't really run wider at the rear.
What I don't get is that OEM (option) fit on mine is 18x9J ET18, so my puzzle factor is huge here. Shame the BC suspension sit 5mm wider at the rear, but hey ho. As always, thoughts and opinions muchly welcomed.