255/45 R17 doesn't belong to the most popular dimensions for winter tyres - there are 3 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 R17, which means it fits to a 17 inch/431.8mm diameter wheel. The total circumference of the tyre is 2077.54 mm, which is very similar to 255/40 R18
(2077.22 mm), 255/35 R19
(2076.91 mm), 255/30 R20
(2076.59 mm), 215/65 R15
(2075.02 mm), 305/25 R20
(2075.02 mm), 225/40 R19
(2081.62 mm), 195/65 R16
(2073.14 mm). There are multiple speed indexes available for winter tyres in 255/45 R17: V
(240km/h). The same goes for weight indexes: 98, 102.
