235/75 R15 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 R15, which means it fits to a 15 inch/381mm diameter wheel. The total circumference of the tyre is 2304.36 mm, which is very similar to 285/35 R21(2302.47 mm), 275/55 R17(2306.87 mm), 205/80 R16(2307.19 mm), 235/70 R16(2310.33 mm), 295/30 R22(2311.58 mm), 285/40 R20(2312.21 mm), 275/45 R19(2293.68 mm). There are multiple speed indexes available for allround tyres in 235/75 R15: H(210km/h), Q(160km/h), S(180km/h), T(190km/h). The same goes for weight indexes: 104, 105, 108, 109. You can find 235/75 R15 on 9 car models - mainly Daewoo, Ford, Hyundai, Chevrolet, Mazda.