As you wish...
It's the smallest diameter wheel that you can get that retains functional radio controls. You lose cruise control unless you also install the Z4 cruise stalk. I don't use cruise so I didn't bother with it. The thickness is about the same as the OE ZHP/M3 wheel once you add a wrap. I want to add another layer though so it's fat af like my M3 wheel below in the comparison shots.
Also I didn't expect it to match anything but the dark grey trim is actually a perfect match for the gauge rings on the ZHP instrument cluster. I mean I meant to do that?