Cooper Discoverer STT PRO 285/70 R17

Cooper Discoverer STT PRO is a tyre made in total of 46 sizes, ranging from R13 to R13 - this particular dimension is R17, which means it fits to a 17 inch/431.8mm diameter wheel. 285/70 R17 is 254mm wider than the narrowest dimension (31) and 20mm narrower than the widest one (305). This tyre profile of 70 means the sidewall height of the tyre is 70% of the tyre width (285mm), which results in 199.5mm sidewall height.