180/55 R17 - Best summer tyres 2025 - market overview, tests, reviews

180/55 R17 doesn't belong to the most popular dimensions for summer tyres - there are 61 tyre models available, which can be compared to 205/60 R15, 225/40 R18, 185/65 R14. Let's break down the sizing - 55 is height of the tyre, which is calculated as 55% of the tyre width (180mm), which means the sidewall height has 99 mm. The wheel diameter is R17, which means it fits to a 17 inch/431.8mm diameter wheel. The total circumference of the tyre is 1978.58 mm, which is very similar to 215/40 R18(1976.69 mm), 245/35 R18(1975.12 mm), 195/70 R14(1974.81 mm), 185/60 R16(1974.18 mm), 225/50 R16(1983.6 mm), 245/40 R17(1972.29 mm), 205/55 R16(1985.17 mm). There are multiple speed indexes available for summer tyres in 180/55 R17: H(210km/h), Q(160km/h), V(240km/h), W(270km/h). The same goes for weight indexes: 73.