235/50 R21 - Best summer tyres 2026 - market overview, tests, reviews

235/50 R21 doesn't belong to the most popular dimensions for summer 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 - 50 is height of the tyre, which is calculated as 50% of the tyre width (235mm), which means the sidewall height has 117.5 mm. The wheel diameter is R21, which means it fits to a 21 inch/533.4mm diameter wheel. The total circumference of the tyre is 2414 mm, which is very similar to 295/40 R21(2417.14 mm), 235/55 R20(2408.03 mm), 265/45 R21(2425 mm), 215/85 R16(2425 mm), 285/45 R20(2401.75 mm), 265/50 R20(2428.45 mm), 255/70 R16(2398.29 mm). There are multiple speed indexes available for summer tyres in 235/50 R21: W(270km/h). The same goes for weight indexes: 101.