Firestone Fs400 265/70 R19.5

Firestone Fs400 is a tyre made in total of 8 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 265/70 R19.5 is 255mm wider than the narrowest dimension (10) and -253mm narrower than the widest one (12). This tyre profile of 70 means the sidewall height of the tyre is 70% of the tyre width (265mm), which results in 185.5mm sidewall height.