Hankook iON evo IK01 305/30 R21

Hankook iON evo IK01 is a summer tyre made in total of 3 sizes, ranging from R20 to R20 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 305/30 R21 is 70mm wider than the narrowest dimension (235) and 0mm narrower than the widest one (305). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (305mm), which results in 91.5mm sidewall height.