Toyo Proxes T1 Sport is a summer tyre made in total of 18 sizes, ranging from R16 to R16 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 245/40 R19 is 20mm wider than the narrowest dimension (225) and 60mm narrower than the widest one (305). 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 Toyo Proxes T1 Sport - "Y", which is good for speeds up to 300 km/h. In 245/40 R19, Proxes T1 Sport usually competes against Roadhawk, which is a tyre from Firestone with a rating of 57%, compared to 0% of the Toyo in question.
