235/60 R20 doesn't belong to the most popular dimensions for allround tyres - there are 0 tyre models available, which can be compared to 155/60 R15, 170/60 R17, 160/60 R14. Let's break down the sizing - 60 is height of the tyre, which is calculated as 60% of the tyre width (235mm), which means the sidewall height has 141 mm. The wheel diameter is R20, which means it fits to a 20 inch/508mm diameter wheel. The total circumference of the tyre is 2481.86 mm, which is very similar to 285/45 R21(2481.54 mm), 275/65 R17(2479.66 mm), 275/70 R16(2486.26 mm), 255/55 R20(2477.15 mm), 285/50 R20(2491.28 mm), 285/40 R22(2471.81 mm), 315/40 R21(2467.41 mm).