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.
The answer to that question is in YOUR right foot. ( many less miles if you mistakenly use your left foot to brake instead of letting off the accelerator ) My 92 Explorer has only had one set of front pads and no rears in 140,000 miles. The 79 chevy p/u only has 70,000 miles and has never needed brakes.