Hi, my 1980 has 255/60/15 tyres on standard original Alloy wheels. The spare wheel is incredibly perished and almost impossible to read the tyre size on it. I want to clean up the steel spare wheel and replace the tyre. I think it’s a 195/80/15. Looking for a suitable tyre on line and they are all terrain type tyres with that measurement. On an American Corvette forum they talk about spare tyres being 225/17/15. Whey wouldn’t the overall diameter be the same as the standard wheel? The spare tyre measurements suggest either a 10 mm or 20mm diameter increase?
Any help would be great. Thanks
Nick
Any help would be great. Thanks
Nick