215/50 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 - 50 is height of the tyre, which is calculated as 50% of the tyre width (215mm), which means the sidewall height has 107.5 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 205/50 R17
(2000.57 mm), 275/30 R19
(2034.5 mm), 205/65 R16
(2113.98 mm), 275/40 R19
(2207.28 mm), 215/45 R16
(1884.64 mm), 275/50 R20
(2459.87 mm), 215/60 R16
(2087.27 mm).
