205/80 R16 doesn't belong to the most popular dimensions for summer tyres - there are 16 tyre models available, which can be compared to 195/50 R15, 165/65 R14, 190/55 R17. Let's break down the sizing - 80 is height of the tyre, which is calculated as 80% of the tyre width (205mm), which means the sidewall height has 164 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 2307.19 mm, which is very similar to 275/55 R17(2306.87 mm), 235/75 R15(2304.36 mm), 235/70 R16(2310.33 mm), 295/30 R22(2311.58 mm), 285/35 R21(2302.47 mm), 285/40 R20(2312.21 mm), 235/65 R17(2316.3 mm). There are multiple speed indexes available for summer tyres in 205/80 R16: H(210km/h), Q(160km/h), R(170km/h), S(180km/h), T(190km/h). The same goes for weight indexes: 104, 110, 111.