205/55 R18 - Best allround tyres 2025 - market overview, tests, reviews

205/55 R18 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 - 55 is height of the tyre, which is calculated as 55% of the tyre width (205mm), which means the sidewall height has 112.75 mm. The wheel diameter is R18, which means it fits to a 18 inch/457.2mm diameter wheel. The total circumference of the tyre is 2144.77 mm, which is very similar to 225/50 R18(2143.19 mm), 285/35 R19(2142.88 mm), 215/70 R15(2142.57 mm), 185/75 R16(2148.54 mm), 295/30 R20(2151.99 mm), 225/45 R19(2152.31 mm), 215/65 R16(2154.82 mm).