Vredestein Wintrac Xtreme S 255/40 R17

Vredestein Wintrac Xtreme S is a winter tyre made in total of 88 sizes, ranging from R15 to R15 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 255/40 R17 is 40mm wider than the narrowest dimension (215) and 40mm narrower than the widest one (295). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (255mm), which results in 102mm sidewall height.