195/80 R15 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 - 80 is height of the tyre, which is calculated as 80% of the tyre width (195mm), which means the sidewall height has 156 mm. The wheel diameter is R15, which means it fits to a 15 inch/381mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 165/70 R14
(1842.86 mm), 245/55 R17
(2203.2 mm), 175/65 R14
(1831.86 mm), 255/35 R18
(1997.11 mm), 180/65 R16
(2011.88 mm), 255/45 R17
(2077.54 mm), 185/65 R14
(1872.7 mm).