Got a set of new alloys today which are definatley 6.5" wide, and comparing them to my Saphire Cosworth alloys they are narrower.

However when i measured the width of the new alloys (from inner rim to outer rim) it was 7.5", and the Saph Cosworth wheels were over 8" wide.

So obviously i am not measing them correctly - how is this done?

Cheers