235/75 R16 doesn't belong to the most popular dimensions for allround tyres - there are 0 tyre models available, which can be compared to 155/60 R15, 170/60 R17, 160/60 R14. Let's break down the sizing - 75 is height of the tyre, which is calculated as 75% of the tyre width (235mm), which means the sidewall height has 176.25 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 2384.15 mm, which is very similar to 285/35 R22(2382.27 mm), 275/45 R20(2373.47 mm), 235/65 R18(2396.09 mm), 255/50 R20(2397.04 mm), 255/55 R19(2397.35 mm), 255/60 R18(2397.66 mm), 255/65 R17(2397.98 mm). There are multiple speed indexes available for allround tyres in 235/75 R16: T(190km/h). The same goes for weight indexes: 108, 112.