265/75 R16 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 - 75 is height of the tyre, which is calculated as 75% of the tyre width (265mm), which means the sidewall height has 198.75 mm. The wheel diameter is R16, which means it fits to a 16 inch/406.4mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 255/55 R19(2397.35 mm), 195/40 R17(1846.63 mm), 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).