225/30 R20 doesn't belong to the most popular dimensions for winter 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 - 30 is height of the tyre, which is calculated as 30% of the tyre width (225mm), which means the sidewall height has 67.5 mm. The wheel diameter is R20, which means it fits to a 20 inch/508mm diameter wheel. The total circumference of the tyre is 2020.04 mm, which is very similar to 215/55 R16
(2019.73 mm), 265/35 R18
(2019.1 mm), 235/45 R17
(2020.99 mm), 265/30 R19
(2015.65 mm), 190/55 R17
(2013.13 mm), 235/40 R18
(2026.96 mm), 180/65 R16
(2011.88 mm).
