155/60 R15 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 R15, which means it fits to a 15 inch/381mm diameter wheel. 155/60 R15 is 10mm wider than the narrowest dimension (145) and 100mm narrower than the widest one (255). This tyre profile of 60 means the sidewall height of the tyre is 60% of the tyre width (155mm), which results in 93mm sidewall height. In 155/60 R15, there is only one possible speed index for Sumitomo Bc100 - "T", which is good for speeds up to 190 km/h.
Sumitomo Bc100 is made in 133 sizes, starting from 145/70 R13 up to 255/45 R20.