Nokian Line SUV is a summer tyre made in total of 33 sizes, ranging from R15 to R15 - this particular dimension is R15, which means it fits to a 15 inch/381mm diameter wheel. 235/75 R15 is 30mm wider than the narrowest dimension (205) and -10mm narrower than the widest one (225). This tyre profile of 75 means the sidewall height of the tyre is 75% of the tyre width (235mm), which results in 176.25mm sidewall height. In 235/75 R15, there is only one possible speed index for Nokian Line SUV - "T", which is good for speeds up to 190 km/h.