Giti Gdr638 235/75 R17.5

Giti Gdr638 is a tyre made in total of 15 sizes, ranging from R18 to R18 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 235/75 R17.5 is 30mm wider than the narrowest dimension (205) and 30mm narrower than the widest one (265). 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.