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General Car Related Discussion.To discuss anything that is related to cars and automotive technology that doesnt naturally fit into another forum catagory.
it can be done but you need to get a flat bar across the back of the rim and make it level to the rim edge.then measure the distance down to the hub. after that really you need a conversion chart.
if you do these and tell me the diameter and wheel width i can ring someone on monday for you to find out
dont you take the measure from where the tyre bead sits? inner rim
instead of outer lip
i know you measure the backspace and take off from wheel centre, just unsure where the wheel is measured from
the way i described is the way i had to do it for a customer of mine to find out what offset his racelines were on his jwrc kitted fiesta.mu suppliers converted it for me from the info i gave them
FFSake------DEAR 'O' DEAR-------JUST IMAGINE NO TYRE ON THE WHEEL!!!,the tyre got f-all to do with it-----
STRAIGHT EDGE ACROSS THE RIM AND MEASURE DOWN TO THE FLAT AREA BINGO!!.
It doesnt actually matter where the wheel width is taken from. Measure the complete width of the wheel. I usually find the actuall overall width is half an inch more either side than its official width so a 7 inch wheel would measure 8 inches. I use two sliding squares with the ruler part clamped together in the middle. This should get you the full width of the wheel. Now work out half this amount. Bare in mind wheel widths are usually measure in J ie inches. You need it in mm. Using your sliding squares again mark off this half way point. Now measure from the back face of the centre of the wheel to this middlepoint you have marked. This is your offset in mm.