Continental Hcs is a summer tyre made in total of 8 sizes, ranging from R13 to R13 - this particular dimension is R22, which means it fits to a 22 inch/558.8mm diameter wheel. 445/65 R22 is 433mm wider than the narrowest dimension (12) and -120mm narrower than the widest one (325). This tyre profile of 65 means the sidewall height of the tyre is 65% of the tyre width (445mm), which results in 289.25mm sidewall height. In 445/65 R22, there is only one possible speed index for Continental Hcs - "K", which is good for speeds up to km/h.