255/45 R22 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 - 45 is height of the tyre, which is calculated as 45% of the tyre width (255mm), which means the sidewall height has 114.75 mm. The wheel diameter is R22, which means it fits to a 22 inch/558.8mm diameter wheel. The total circumference of the tyre is 2476.52 mm, which is very similar to 255/55 R20
(2477.15 mm), 275/65 R17
(2479.66 mm), 285/40 R22
(2471.81 mm), 285/45 R21
(2481.54 mm), 315/40 R21
(2467.41 mm), 275/70 R16
(2486.26 mm), 275/55 R19
(2466.46 mm).
