Spacers, how thick when dealing with light rub?

  1. #1
    Ive bought a set of DJ Wheels 14" x 6 alloys off ebay that were from a 106, ive just put them on, theyre fine on front but have light rub on inner arch on rear.

    They fit on ok but with a folded up peice of paper (a4 folded twice so thickness of 4 peices of paper) between the wheel and inner arch, i can feel it rubbing. I believe them to be ET20 (DJ only do ET37 and ET20 of these wheels at this size and PCD and i assume ET37 wouldnt even have gone on!).

    So should assuming theyre ET20, should i just go for 5mm on rear to bring them to ET15 or should i go with 7mm? Is it sensible to space the front if im spacing the rear?

    Finally, do the standard bolts still fit with 5 or 7mm spacers?

    Thanks