by ACourtney » Sat Jan 04, 2014 9:59 pm
I imagine that most Midas owners have 13" steering wheels as that was the standard MG Metro size and also on the Rover Metro GTi. This is based on the convention of using the mean diameter - i.e. centreline of the rim.
Some manufacturers use the outside diameter as the quoted size, so one manufacturer's 13" wheel can be smaller than another's. Also, if they use the centreline convention, then a thin wooden rimmed 14" wheel may have the same OD as thick leather rimmed 13" wheel.
Your best bet is to measure the OD of your existing wheel and find out the true OD of the one that you want to buy and then see how it would fit and whether you can live with the clearance.