245/60 R18 Royal Black Royal Sport variants
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Royal Black Royal Sport is a tyre made in total of 30 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/60 R18 is 30mm wider than the narrowest dimension (215) and 40mm narrower than the widest one (285). This tyre profile of 60 means the sidewall height of the tyre is 60% of the tyre width (245mm), which results in 147mm sidewall height. In 245/60 R18, there is only one possible speed index for Royal Black Royal Sport - "H", which is good for speeds up to 210 km/h.
Royal Black Royal Sport is made in 30 sizes, starting from 215/70 R16 up to 285/50 R20.