See also:

Fuel octane rating
This octane rating is the average of the Research Octane and Motor Octane numbers and is commonly referred to as the Anti Knock Index (AKI). Using a gasoline with a lower octane rating can ca ...

Wear indicators
1) New tread 2) Worn tread 3) Tread wear indicator Each tire incorporates a tread wear indicator, which becomes visible when the depth of the tread grooves decreases to 0.063 in (1.6 mm). ...

Tire care – maintenance and safety practices
● Check on a daily basis that the tires are free from serious damage, nails, and stones. At the same time, check the tires for abnormal wear. ● Inspect the tire tread regularly and repl ...