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How to adjust speedometer for tire size
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The speedometer of the car is inaccurate. If the error is relatively large, you can generally see whether the tire size of the car has changed. If the tire has not been changed, it is likely to be caused by the odometer sensor failure. The replacement can be adjusted to the normal state
To enlarge the wheel hub, the flat ratio of the tire must be reduced accordingly, so that the size of the tire can be close to the original specification, and the speedometer will not be affected. For example, the 195/55/15 tire uses a 15 inch wheel hub, and the 16 inch wheel hub size and its approximate tire specification are 195/50/16. It can be seen that the flat ratio must be reduced correspondingly when the tire width is unchanged. For example, the sizes of tires of several specifications are similar, 185/65/14.185/60/15.195/55/15.195/50/16.205/45/16
Changing the tire width will not affect the speed, but the tire diameter. No matter how you upgrade, it is best not to change the tire diameter, as long as the error of the tire diameter is within 3%. If 165/70/17 is upgraded to 205/55/16 tires, we can calculate it through the tire computer. Through calculation, it is known that the tire diameter of 205/55/16 is 7.72% larger than that of 165/70/14, which is far beyond the upper limit of 3% and cannot be upgraded directly. It is a ring-shaped elastic rubber product of grounding rolling assembled on various vehicles or machinery. Usually installed on the metal rim, it can support the vehicle body, buffer the external impact, achieve contact with the road and ensure the driving performance of the vehicle. Tyres are often used in complex and harsh conditions. They bear various deformation, load, force and high and low temperature effects when driving.
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