Sumitomo Wt200 is a tyre made in total of 39 sizes, ranging from R13 to R13 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. 205/60 R16 is 50mm wider than the narrowest dimension (155) and 20mm narrower than the widest one (225). This tyre profile of 60 means the sidewall height of the tyre is 60% of the tyre width (205mm), which results in 123mm sidewall height. In 205/60 R16, there is only one possible speed index for Sumitomo Wt200 - "H", which is good for speeds up to 210 km/h.