BFGoodrich G-FORCE WINTER is a winter tyre made in total of 15 sizes, ranging from R13 to R13 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 245/40 R19 is 90mm wider than the narrowest dimension (155) and 0mm narrower than the widest one (245). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (245mm), which results in 98mm sidewall height. In 245/40 R19, there is only one possible speed index for BFGoodrich G-FORCE WINTER - "V", which is good for speeds up to 240 km/h. In 245/40 R19, G-FORCE WINTER usually competes against Blizzak W810, which is a tyre from Bridgestone with a rating of 0%, compared to 0% of the BFGoodrich in question.