255/45 R17 doesn't belong to the most popular dimensions for winter 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 - 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 R17, which means it fits to a 17 inch/431.8mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 265/75 R16
(2525.53 mm), 205/60 R16
(2049.58 mm), 275/40 R18
(2127.49 mm), 215/40 R17
(1896.89 mm), 275/45 R21
(2453.27 mm), 215/55 R17
(2099.53 mm), 285/30 R19
(2053.34 mm).
