225/65 R16 doesn't belong to the most popular dimensions for allround tyres - there are 12 tyre models available, which can be compared to 165/60 R15, 185/55 R14, 170/60 R17. Let's break down the sizing - 65 is height of the tyre, which is calculated as 65% of the tyre width (225mm), which means the sidewall height has 146.25 mm. The wheel diameter is R16, which means it fits to a 16 inch/406.4mm diameter wheel. The total circumference of the tyre is 2195.66 mm, which is very similar to 195/75 R16(2195.66 mm), 275/30 R21(2194.09 mm), 155/70 R19(2197.86 mm), 275/35 R20(2200.69 mm), 245/55 R17(2203.2 mm), 225/70 R15(2186.55 mm), 225/60 R17(2204.77 mm). There are multiple speed indexes available for allround tyres in 225/65 R16: R(170km/h), T(190km/h). The same goes for weight indexes: 112. You can find 225/65 R16 on 9 car models - mainly Mercedes-Benz, Nissan, Dodge, Chrysler, Opel.