275/35 R21 - Best tyres 2025 - market overview, tests, reviews

275/35 R21 doesn't belong to the most popular dimensions for tyres - there are tyre models available, which can be compared to 325/30 R21, 155/60 R15, 155/65 R13. Let's break down the sizing - 35 is height of the tyre, which is calculated as 35% of the tyre width (275mm), which means the sidewall height has 96.25 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 mm, which is very similar to 295/40 R21(2417.14 mm), 225/70 R15(2186.55 mm), 325/25 R20(2106.44 mm), 235/40 R19(2106.75 mm), 235/55 R17(2168.64 mm), 235/65 R17(2316.3 mm), 155/70 R19(2197.86 mm).