275/50 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 - 50 is height of the tyre, which is calculated as 50% of the tyre width (275mm), which means the sidewall height has 137.5 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 225/35 R20
(2090.73 mm), 285/60 R18
(2510.76 mm), 225/50 R18
(2143.19 mm), 295/35 R20
(2244.67 mm), 225/60 R18
(2284.57 mm), 315/30 R22
(2349.28 mm), 235/35 R20
(2112.72 mm).
