Does changing tires affect the mileage?
3 Answers
Changing tires does affect the mileage. Generally speaking, as long as the tire specifications are altered, the odometer will show some variation. However, it is necessary to ensure that the diameter difference between the old and new tires is within ±3%. After switching to larger rims, there are typically two scenarios: Tire diameter and circumference remain unchanged: If the rim size is increased but the tire diameter and circumference remain the same, the vehicle's speed will not change. Tire diameter and circumference are altered: If the rim size is increased along with changes in tire diameter and circumference, when the new tire specifications are larger than the original, the actual speed of the vehicle will be higher than the speed displayed on the dashboard at the same indicated speed. Conversely, if the new tire specifications are smaller, the actual speed will be lower than the dashboard reading. Note: (When the vehicle is equipped with ABS, changing tire specifications may affect the response speed and effectiveness of the ABS, posing a safety risk).
I've also thought about this after changing tires. The mileage itself won't change because the car's odometer records the rotation count of the engine and drivetrain, which isn't directly related to the tires. However, if the new tires have lower rolling resistance, like switching to energy-saving tires, it can indeed reduce fuel consumption, allowing you to drive farther on the same amount of fuel. But if you choose the wrong tire size, such as a larger diameter than the original, each tire rotation covers more distance, which might make the odometer read less than the actual distance traveled. This situation is relatively rare. As long as you choose the correct size, there's nothing to worry about. In fact, new tires with better grip make driving more stable and can help prevent skidding accidents.
Buddy, I've specifically researched this tire replacement thing – it basically doesn't affect the odometer reading. The mileage counter works via wheel speed sensors, regardless of whether your tires are new or old. But getting new tires can actually save fuel! After switching to low rolling resistance tires, I clearly noticed my fuel consumption dropped by half a liter per 100km – getting dozens more kilometers per tank is no exaggeration. If tires aren't installed properly or are underinflated, the increased rolling resistance will actually waste more fuel. So when replacing, remember to choose OEM specifications and learn to read the tire pressure label to maintain standard values. Regularly check that the tread isn't worn out – it's safer and saves money, so why not?
