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 160/60 R18
(2039.52 mm), 245/40 R20
(2211.68 mm), 165/70 R14
(1842.86 mm), 245/50 R20
(2365.62 mm), 175/65 R14
(1831.86 mm), 255/30 R20
(2076.59 mm), 180/65 R16
(2011.88 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.
