The odometer has been around since around 27 BC. It was first description was by Vitruvius, a Roman writer and architect. His odometer was a chariot wheel four feet in diameter turning 400 times for one Roman mile. There was a 400 tooth cogwheel that turned one complete revolution per mile. This cogwheel engaged another wheel that dropped pebbles one by one into a box. The distance traveled would be measure by counting the pebbles at the end of the trip. Odometers have been used by the ancient Chinese, by the mile markers of Alexander the Great and even Benjamin Franklin. Modern inventors like William Clayton who has created odometers that where separate gears that controlled each digit that we know today.
When purchasing a car the odometer informs you on the wear and tear the car has been through. The main problem with mechanical odometers is that the dials can become worn and the gears can strip. Since the odometer is an internal item there is no preventive maintenance needed. The odometer is equipped with a trip meter call a trip odometer that allows the user to check the mileage of any particular distance separate from the main odometer. The trip odometer can be reset by the user.
One of the most common automotive scams involves the odometer. By rolling back the mileage a buyer can be tricked into thinking there are fewer miles on the vehicle than actually are. Here are some tips to let you know when you are dealing with a car that might have the odometer rolled back: