have trolled up an and down the internet trying to find a answer to this question, my reason for asking is I have found a set of rims with the following offset Rear wheels 17 wheels ET 47 width 9J
They're not the same as standard but they'll work ok. I used to run Speedlines, ET44 9J on the rear and ET52 8J on the front - but this was on a race car with rolled arches etc so do check clearances and modify if necessary.
