325/25 R21 - Best tyres 2025 - market overview, tests, reviews

325/25 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 - 25 is height of the tyre, which is calculated as 25% of the tyre width (325mm), which means the sidewall height has 81.25 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 265/30 R21(2175.24 mm), 195/65 R14(1913.54 mm), 265/40 R19(2182.15 mm), 200/55 R17(2047.69 mm), 265/55 R19(2431.91 mm), 205/50 R17(2000.57 mm), 275/30 R19(2034.5 mm).