Sumitomo Bc100 155/70 R13

Sumitomo Bc100 is a tyre made in total of 137 sizes, ranging from R13 to R13 - this particular dimension is R13, which means it fits to a 13 inch/330.2mm diameter wheel. 155/70 R13 is 10mm wider than the narrowest dimension (145) and 100mm narrower than the widest one (255). This tyre profile of 70 means the sidewall height of the tyre is 70% of the tyre width (155mm), which results in 108.5mm sidewall height.