Unigrip Lateral Force 4S 285/40 R20

Unigrip Lateral Force 4S is a tyre made in total of 100 sizes, ranging from R17 to R17 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/40 R20 is 70mm wider than the narrowest dimension (215) and 10mm narrower than the widest one (295). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (285mm), which results in 114mm sidewall height.