Goodride Z507 is a winter tyre made in total of 47 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 235/40 R18 is 30mm wider than the narrowest dimension (205) and 40mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (235mm), which results in 94mm sidewall height. In
235/40 R18, Z507 usually competes against
Blizzak LM-005, which is a tyre from
Bridgestone with a rating of 87%, compared to 16% of the
Goodride in question.
Winter
