See also:

Drive sensibly – save fuel
Observe the following tips to save fuel: The tires should always be inflated to the recommended tire pressure. Remove unnecessary loads. Remove roof racks when they are not needed. Warm up ...

Bar
Metric unit for tire pressure. There are 14.5038 pounds per square inch (psi) to 1 bar; there are 100 kilopascals (kPa) to 1 bar. ...

Traction
Traction is the result of friction between the tires and the road surface. ...