175/40 R15 - Best allround tyres 2025 - market overview, tests, reviews

175/40 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 - 40 is height of the tyre, which is calculated as 40% of the tyre width (175mm), which means the sidewall height has 70 mm. The wheel diameter is R15, which means it fits to a 15 inch/381mm diameter wheel. The total circumference of the tyre is 1636.77 mm, which is very similar to 155/65 R13(1670.38 mm), 165/65 R13(1711.23 mm), 155/70 R13(1719.08 mm), 160/60 R14(1720.34 mm), 165/60 R14(1739.19 mm), 195/45 R15(1748.3 mm), 155/65 R14(1750.18 mm).