185/60 R12 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 - 60 is height of the tyre, which is calculated as 60% of the tyre width (185mm), which means the sidewall height has 111 mm. The wheel diameter is R12, which means it fits to a 12 inch/304.8mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 235/50 R19
(2254.41 mm), 235/65 R16
(2236.5 mm), 155/70 R13
(1719.08 mm), 245/35 R19
(2054.92 mm), 165/60 R14
(1739.19 mm), 245/45 R17
(2049.26 mm), 170/60 R17
(1997.42 mm).
