185/65 R15 doesn't belong to the most popular dimensions for 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 - 65 is height of the tyre, which is calculated as 65% of the tyre width (185mm), which means the sidewall height has 120.25 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 255/70 R18(2557.88 mm), 195/60 R14(1852.28 mm), 265/35 R21(2258.49 mm), 195/70 R16(2134.4 mm), 265/45 R21(2425 mm), 205/45 R17(1936.16 mm), 265/70 R16(2442.27 mm). You can find 185/65 R15 on 63 car models - mainly CITROËN, Fiat, Nissan, Peugeot, Dacia.