Heidenau K 66 170/80 R15

Heidenau K 66 is a tyre made in total of 50 sizes, ranging from R13 to R13 - this particular dimension is R15, which means it fits to a 15 inch/381mm diameter wheel. 170/80 R15 is 60mm wider than the narrowest dimension (110) and -50mm narrower than the widest one (120). This tyre profile of 80 means the sidewall height of the tyre is 80% of the tyre width (170mm), which results in 136mm sidewall height.