Hankook Winter I-Cept iOn X 255/45 R21

Hankook Winter I-Cept iOn X is a winter tyre made in total of 41 sizes, ranging from R17 to R17 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 255/45 R21 is 40mm wider than the narrowest dimension (215) and 40mm narrower than the widest one (295). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (255mm), which results in 114.75mm sidewall height.