Toyo Proxes Sport 2 is a summer tyre made in total of 45 sizes, ranging from R18 to R18 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 295/40 R21 is 80mm wider than the narrowest dimension (215) and -10mm narrower than the widest one (285). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (295mm), which results in 118mm sidewall height. In 295/40 R21, there is only one possible speed index for Toyo Proxes Sport 2 - "Y", which is good for speeds up to 300 km/h. In 295/40 R21, Proxes Sport 2 usually competes against Azenis Fk520, which is a tyre from Falken with a rating of 72%, compared to 63% of the Toyo in question.