215/40 R18 Sumitomo Bc100 variants
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Sumitomo Bc100 is a tyre made in total of 133 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 215/40 R18 is 70mm wider than the narrowest dimension (145) and 40mm narrower than the widest one (255). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (215mm), which results in 86mm sidewall height. In 215/40 R18, there is only one possible speed index for Sumitomo Bc100 - "W", which is good for speeds up to 270 km/h.
Sumitomo Bc100 is made in 133 sizes, starting from 145/70 R13 up to 255/45 R20.
