I'm still working through the center caps on the front due to the size of the hub. Initial modifications are promising, just need to make the mounting tabs a bit smaller to fit between the wheel and the hub. Rears fit no problem.

I went with some pretty wide 225 55 17 from Bridgestone, they run wide for 225s. Maybe a narrower 225 or even a 215 would have worked better. Had to roll the rear fenders. May need a bit more rolling.

Thanks. I wanted to keep a significant sidewall to keep with the character of the car. 17" was the right compromise for me between looks and performance.

The e39 wheels have a 74mm hub bore and 5x120 pattern making them an easy swap.

Successful in the modification of the front center caps. I had to cut some of the inner structure and drill a hole in the center because it was the low point of the center cap.

Now I just need to order 4 new center caps and 4 70mm leader emblems.