Toyo Proxes T1 Sport is a summer tyre made in total of 7 sizes, ranging from R16 to R16 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 255/35 R20 is 30mm wider than the narrowest dimension (225) and 20mm narrower than the widest one (275). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (255mm), which results in 89.25mm sidewall height. In 255/35 R20, Proxes T1 Sport usually competes against Powerproof, which is a tyre from Nokian with a rating of 51%, compared to 0% of the Toyo in question.