Nokian Rockproof 245/70 R17

Nokian Rockproof is a summer tyre made in total of 7 sizes, ranging from R16 to R16 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 245/70 R17 is 20mm wider than the narrowest dimension (225) and 40mm narrower than the widest one (285). This tyre profile of 70 means the sidewall height of the tyre is 70% of the tyre width (245mm), which results in 171.5mm sidewall height.