For each tire model, the tire diameter will vary. Most time dealer recommends to stay within 3% of the diameter/height of the original tire when changing the tire sizes. More than that you’ll get the risk of facing a brake failure.
The formula in getting the Tire Diameter is:
Tire Diameter = 2*(Tire Width / 25.4*) * (aspect ratio / 100 ) – (wheels size * -1)
By using the tire diameter calculator it will quickly calculate your tire diameter if you enter the aspect ratio, tire width (in mm), and the wheel size (in inches). You need to keep in mind that different brands have some differences in their tire sizes as well as used tires and those tires that have differing amount of wear.
Here’s How to Manually Calculate your vehicle Tire Diameter:
Example: Tire Size is 225 / 50R 16 using the equation.
How to Maintain Car Tire and Maximize Lifespan
The condition of our car tires are the result of the changes in weather, road types, vehicle dynamics, driving conditions, years of usage and the lack of maintenance. But with care and maintenance effort you’ll be able to ensure safety and minimize the occurrence of undesirable issues. Stop panicking, here’s an important guidelines that you can use:
1. Maintain the right tire pressure. Before leaving the garage, always make sure that your car tires are in good running condition at a recommended levels. Under-inflation and over-inflation of tires induced wear and tear. Fuel efficiency is ensured as well as steering control.
2. Keep track on the wearing process. The best to do this is through doing the penny test. It is done by placing a penny on the tire thread. If you see half of Lincoln’s head then a tire replacement is likely a recommendation.
3. Wheel Alignment. Aligning your wheel allows the proper weight distribution of your vehicle evenly on all four wheels. By doing so, you’ll have good handling and steering capability as well as avoiding the sideways drag.
4. Tire Rotation. Tire rotation is done in order to help extend the life of your tires. The right front goes to the back left, left front goes to the back right and vice versa.
By Following this simple guidelines, you are not only extending the lifespan of your car tires but you help ensure safety aboard from any vehicular accidents.
Updated November 13, 2015