How to Calibrate Speedometer for Larger Tires Chevy?

how to calibrate speedometer for larger tires chevy

The speedometer informs the driver about the speed of the car. These measuring devices are usually calibrated for the standard spare parts. Replacing spare parts, including the tires, may result in a malfunction in the speedometer performance. Tires of a bigger size can cause the device to show a lower figure than the true speed of the car. And tires of smaller diameter will indicate a higher speed of the car than it actually is. In this case, you can calibrate the speedometer. Let’s figure it out, how to calibrate speedometer for larger tires Chevy!

How Does Tire Size Affect Speedometer Reading?

Many car owners, when purchasing tires, change the dimension of tires for a certain season. The cold season demands truck mud fires. For the summer period, drivers install lower and wider tires. And in winter, it is more practical to drive on narrower tires with a higher profile.

When switching to different tire sizes, it is important to remember one thing. A significant change in tire size does not go unnoticed for a vehicle. Besides the incorrect display of the speedometer, brake and traction performance of the car are affected. As a rule, fuel consumption increases, and acceleration dynamics decrease. Best truck mud and snow tires should remain within recommended parameters.

How Much Does Your Speedometer Change with Bigger Tires?

The tire size affects the speed parameter. Of course, the speed of the car will also change. But it is wrong to assume that it changes in proportion to the change in the size of the wheels. It will not happen as engine power remains the same.

In any case, the tire indications given by the manufacturer should not be neglected. Unless it is absolutely necessary, do not install tires out of allowed tolerance. Incorrectly selected tires can lead to incorrect operation of electronic systems of the car.

Speedometer Calibration Tips

To correct the speedometer data, first of all, you must determine the percentage of its deviation. To do this, you will need GPS on the connected device. For example, a smartphone with an application. After you have found out the discrepancy, connect the speedometer calibration tool to the speed sensor. Follow the instructions to make the necessary adjustments. As an additional advantage, the correction of the speedometer readings will also improve odometer performance. It will show the actual mileage since both devices of the car are using the same sensor.

How Big Tires Can I Fit on My Chevy 1500?

To make the search of tires easy and accurate, you need certain data.  To begin with, you will have to enter:

  1. Car brand (Chevrolet).
  2. The model of car.
  3. Year of release.
  4. Engine modification.

In the end, you will get a list of search results that meet your request. Besides, there are plenty of online resources that will quickly help in this matter.

Do You Have to Adjust Speedometer for Bigger Tires?

In most cases, we choose the tires that correspond to the manufacturer’s recommendations. So there is no need to worry about the speedometer data. But if the parameters differ from the suggested ones, then you will have to use a speedometer calibration tool. The best approach after installation of wrong size tires is to adjust the measuring device. As a rule, manufacturers calibrate speedometers. The parameters are stated on the vehicle frame in the doorway on the driver’s side. And if you ignore these sizes and opt for different tires, the speedometer starts showing distorted data.

How Does Wheel Size Affect Speed?

how does wheel size affect speedСhanging the wheel circumference affects not only the speedometer (and odometer) readings. It also influences the work of the gearbox, the gear ratios of which are calculated for specific wheel sizes. If you put the wheels with a bigger diameter, you will get less intense acceleration. At the same time, bigger wheels mean an increase in the road gap. It results in an increase in maximum speed. In one turn a larger diameter wheel travels a longer distance. Increasing the width of the tire means increasing the area of contact with the road. Besides, traction with the road will also increase. It improves the handling of the car and the speed of passing the turnings.


How Do Bigger Tires Affect Odometer?

In modern vehicles, odometers and speedometers are interconnected. Thus, it is quite natural that any inaccuracies in the speedometer operation will automatically be reflected in the odometer data. So, it is correct to state that the odometer display figure greatly depends on the correctness of the tire size. Hence, if you install tires with a considerable tolerance deviation, then the odometer inaccuracy may significantly grow.

Do Smaller Tires Affect Gas Mileage?

When starting from a place, it is easier for the engine to rotate a wheel of a smaller size. In this case, it spends less energy and fuel, respectively. Therefore, the choice is obvious for a car that drives mainly around the city with frequent stops. It is more profitable to use tires of the smallest possible size from the point of view of the economy. Do you spend most of the time on country roads? Then it’s worth stopping on wheels of the maximum radius allowed by the manufacturer’s specifications.

It is important to understand that there are no absolutely accurate instruments. Any metrologist will confirm it to you. It is never possible to measure one or another value without the slightest deviation. As a rule, manufacturers calibrate speedometers with a little plus. And your speedometer shows a bit higher speed than it actually is. Furthermore, speedometer readings are influenced when you change spare parts, especially wheels. You can always check the speed using GPS, which data does not depend on any related factors. And then, either adjust your speedometer or just learn how to correctly estimate the true speed in your mind.

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