Maxxis Victra Sport 5 is a summer tyre made in total of 73 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 315/35 R20 is 110mm wider than the narrowest dimension (205) and -20mm narrower than the widest one (295). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (315mm), which results in 110.25mm sidewall height. In 315/35 R20, there is only one possible speed index for Maxxis Victra Sport 5 - "W", which is good for speeds up to 270 km/h.