235/40 R19 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 - 40 is height of the tyre, which is calculated as 40% of the tyre width (235mm), which means the sidewall height has 94 mm. The wheel diameter is R19, which means it fits to a 19 inch/482.6mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 180/55 R17(1978.58 mm), 255/40 R20(2236.81 mm), 185/60 R15(1894.38 mm), 255/55 R18(2317.55 mm), 190/50 R17(1953.44 mm), 255/70 R16(2398.29 mm), 195/55 R16(1950.61 mm). You can find 235/40 R19 on 13 car models - mainly Aston Martin, Lexus, Peugeot, Alfa Romeo, CITROËN.