275/55 R17 doesn't belong to the most popular dimensions for winter tyres - there are 5 tyre models available, which can be compared to
155/60 R15,
170/60 R17,
160/60 R14. Let's break down the sizing - 55 is height of the tyre, which is calculated as 55% of the tyre width (275mm), which means the sidewall height has 151.25 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 2306.87 mm, which is very similar to 205/80 R16
(2307.19 mm), 235/75 R15
(2304.36 mm), 235/70 R16
(2310.33 mm), 285/35 R21
(2302.47 mm), 295/30 R22
(2311.58 mm), 285/40 R20
(2312.21 mm), 235/65 R17
(2316.3 mm). There are multiple speed indexes available for winter tyres in 275/55 R17: H
(210km/h), V
(240km/h). The same goes for weight indexes: 109.
