I have E38 M Parallels on my E39 528i. They came wrapped with PS2 245/40/18 up front and 275/35/18 in the rear. I left them alone for a year without spacers. I decided to purchase a size down for my next set of tires so therefore a 235/40/18 front and 265/35/18. I ran a 15mm spacer up front and 15mm spacer in the rear. I rubbed a little with passengers(4) in the car in the back and I'm lowered on coilovers. If I were to do it again I would of just left my 275/35/18 tires in the back and used no spacers period.
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