160/80 R15 doesn't belong to the most popular dimensions for summer tyres - there are 3 tyre models available, which can be compared to
155/60 R15,
170/60 R17,
160/60 R14. Let's break down the sizing - 80 is height of the tyre, which is calculated as 80% of the tyre width (160mm), which means the sidewall height has 128 mm. The wheel diameter is R15, which means it fits to a 15 inch/381mm diameter wheel. The total circumference of the tyre is 2001.19 mm, which is very similar to 205/50 R17
(2000.57 mm), 225/40 R18
(2001.82 mm), 170/60 R17
(1997.42 mm), 255/40 R17
(1997.42 mm), 255/35 R18
(1997.11 mm), 175/80 R14
(1996.8 mm), 255/30 R19
(1996.8 mm). There are multiple speed indexes available for summer tyres in 160/80 R15: S
(180km/h), V
(240km/h). The same goes for weight indexes: 74.