jimphudson 0 Posted February 25, 2010 Report Share Posted February 25, 2010 Alright all just wondered if anyone can shed some light on this for me. I have some porsche boxster wheels to put on my car the fronts are 7x 17 et55 the rears are 8.5x17 et 50 i had a look on the calculator at the top of this page and got back inner clearance 34mm less and outer extended 4mm and the fronts inner clearance 20mm less and outers retracted by 20mm. I guess this means I need 20mm adapters on the front what would you recomend for the backs 30mm or 35mm anyone done this and knows any advice would be great cheers all sorry for rattling on just want it perfect first time. Link to post Share on other sites
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