195/55 R20 doesn't belong to the most popular dimensions for tyres - there are tyre models available, which can be compared to
325/30 R21,
155/60 R15,
155/65 R13. Let's break down the sizing - 55 is height of the tyre, which is calculated as 55% of the tyre width (195mm), which means the sidewall height has 107.25 mm. The wheel diameter is R20, which means it fits to a 20 inch/508mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 235/50 R18
(2174.61 mm), 235/60 R18
(2322.27 mm), 155/65 R13
(1670.38 mm), 245/35 R18
(1975.12 mm), 160/60 R18
(2039.52 mm), 245/40 R21
(2291.48 mm), 165/70 R14
(1842.86 mm).
