Continental Hcs is a summer tyre made in total of 8 sizes, ranging from R13 to R13 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 365/85 R20 is 353mm wider than the narrowest dimension (12) and -40mm narrower than the widest one (325). This tyre profile of 85 means the sidewall height of the tyre is 85% of the tyre width (365mm), which results in 310.25mm sidewall height. In 365/85 R20, there is only one possible speed index for Continental Hcs - "L", which is good for speeds up to km/h.