Does changing tires affect the mileage?

[HarmonyAnn]

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).