Goodyear Vector 4Seasons G3 is a allround tyre made in total of 31 sizes, ranging from R15 to R15 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 245/50 R19 is 70mm wider than the narrowest dimension (175) and 30mm narrower than the widest one (275). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (245mm), which results in 122.5mm sidewall height. In 245/50 R19, there is only one possible speed index for Goodyear Vector 4Seasons G3 - "H", which is good for speeds up to 210 km/h.