135/80 R13 doesn't belong to the most popular dimensions for summer 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 - 80 is height of the tyre, which is calculated as 80% of the tyre width (135mm), which means the sidewall height has 108 mm. The wheel diameter is R13, which means it fits to a 13 inch/330.2mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 215/40 R18
(1976.69 mm), 275/45 R21
(2453.27 mm), 215/55 R18
(2179.32 mm), 285/30 R19
(2053.34 mm), 215/75 R15
(2210.11 mm), 285/40 R19
(2232.42 mm), 225/40 R19
(2081.62 mm). There are multiple speed indexes available for summer tyres in 135/80 R13: T
(190km/h). The same goes for weight indexes: 70, 74.
