I need a bit of help decoding the American tyre sizes quoted for 70s vehicles (this system not used here in Australia). Need a decode for the letters used in F60x15, E60x15, G60x15, F70x14 etc. I'm guessing the letters define a certain tread width and the 70 for example is sidewall height as a percentage as per current sizing.
Also wondering what the largest tyres available were for 70-74 cudas from the factory. Cheers, Mark.