200/55 R17 doesn't belong to the most popular dimensions for winter tyres - there are 7 tyre models available, which can be compared to
155/60 R15,
160/60 R18,
165/60 R14. Let's break down the sizing - 55 is height of the tyre, which is calculated as 55% of the tyre width (200mm), which means the sidewall height has 110 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 2047.69 mm, which is very similar to 185/80 R14
(2047.06 mm), 245/45 R17
(2049.26 mm), 205/60 R16
(2049.58 mm), 225/60 R15
(2045.18 mm), 215/45 R18
(2044.23 mm), 170/80 R15
(2051.46 mm), 285/25 R20
(2043.61 mm). There are multiple speed indexes available for winter tyres in 200/55 R17: W
(270km/h). The same goes for weight indexes: 78.
