Firestone Fs400 245/70 R19

Firestone Fs400 is a tyre made in total of 7 sizes, ranging from R13 to R13 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 245/70 R19 is 235mm wider than the narrowest dimension (10) and 20mm narrower than the widest one (265). This tyre profile of 70 means the sidewall height of the tyre is 70% of the tyre width (245mm), which results in 171.5mm sidewall height.