Fingers: If the width of a human finger is 2.2 cm (7â8 in), then a million fingers lined up would cover a distance of 22 km (14 mi). If a person walks at a speed of 4 km/h (2.5 mph), it would take them approximately five and a half hours to reach the end of the fingers.
The rotors on a vehicle can last anywhere from 30,000 to 70,000 miles and sometimes more. A licensed mechanic, such as one from YourMechanic, can evaluate the rotors and advise you on their status; they may not need to be changed as often as the brake pads. Like brake pads, they should be replaced in pairs.
How to tell if your brakes need replacing. Generally, brake pads need to be replaced after about 50,000 miles. Some need to be replaced after 25,000, while others can last for 70,000 miles â it all depends on the factors listed above. To get a more accurate number for your carâs specific needs, consult the owner's manual.