as I am thinking of getting winter tyres on a spare set of standard Yaris steel wheels which I have yet to purchase (2002 Yaris Model) I had a look at the tyres.Tyres read 155/80R13 79T. Current Yaris brochure gives them as 15 inch steel wheels and 185/60R15 Tyres. I am confused as I want to make sure that winter wheels/tyres are identical size to my summer wheels/tyres. Help please. Also where is the best place to get new Yaris steel wheels for my 2002 model, will main agents order them up or do I get them somewhere else? Many thanks,Frank.