275/50 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 - 50 is height of the tyre, which is calculated as 50% of the tyre width (275mm), which means the sidewall height has 137.5 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 235/35 R19
(2032.92 mm), 235/45 R20
(2260.38 mm), 235/60 R16
(2162.67 mm), 155/60 R15
(1781.28 mm), 235/85 R16
(2531.81 mm), 160/60 R17
(1959.73 mm), 245/40 R19
(2131.88 mm).