Falken Sincera SN-832 Ecorun is a summer tyre made in total of 30 sizes, ranging from R12 to R12 - this particular dimension is R13, which means it fits to a 13 inch/330.2mm diameter wheel. 155/80 R13 is 20mm wider than the narrowest dimension (135) and 40mm narrower than the widest one (195). This tyre profile of 80 means the sidewall height of the tyre is 80% of the tyre width (155mm), which results in 124mm sidewall height. In 155/80 R13, there is only one possible speed index for Falken Sincera SN-832 Ecorun - "T", which is good for speeds up to 190 km/h.