Bridgestone Dueler H/T 689 is a summer tyre made in total of 4 sizes, ranging from R16 to R16 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. This tyre profile of 80 means the sidewall height of the tyre is 80% of the tyre width (205mm), which results in 164mm sidewall height. In 205/80 R16, there are 2 possible speed indexes for Bridgestone Dueler H/T 689 - "T","R", which are good for speeds up to 190, 170 km/h.