Is it possible that 2000 model 540 wheels would fit on a 2800CS? I know the fender edges must be rolled for 16's and the preferred coupeking set up is 16x7 with 11mm offset front and 16x8 with 24mm offset. The 540 15 spoke wheels are 17x8 front and 17x9 rear. Does anyone know the offset for these?
This may help you. http://www.scrappycrow.com/e28wheelstires/e28wheelstires.html Also look for excel spreadsheet in this link with lots of data.
Mr. Nelson is anti anything over 16". Anything larger will not only reduce ride quality; but handling too. In addition the e9 chassis just isn't capable of running anything larger than 16, you'll end up shoving a shock through the tower.