Continental ContiWinterContact TS 830P 245/30 R20

Continental ContiWinterContact TS 830P is a winter tyre made in total of 140 sizes, ranging from R13 to R13 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 245/30 R20 is 50mm wider than the narrowest dimension (195) and 10mm narrower than the widest one (255). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (245mm), which results in 73.5mm sidewall height.