How to Adjust a Speedometer for Larger Tires? | A Guide

If your speedometer is reading inaccurately high or low after you’ve installed larger tires, you’ll need to adjust it. Fortunately, this is a relatively easy process that only requires a few tools. First, find a level spot on the ground where you can park your vehicle and set the emergency brake.

Then, locate the adjustment screws on the back of the speedometer head – there should be one for each direction. Using a small screwdriver, turn each screw until the pointer on the speedometer reads accurately.

  • Park your vehicle on a level surface and turn off the engine
  • Find the circumference of your new tires by wrapping a measuring tape around the center of the tire tread
  • Convert the circumference of your new tires to miles per hour using this formula: MPH = (the circumference in inches x 0
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  • Compare the speedometer reading with your GPS to see how much it differs
  • Adjust the speedometer by loosening the screws that hold it in place, rotating it to the correct position, and then tightening the screws again

Speedometer Calibration – Adjust for Bigger Tires – Accurate Shifting & Fuel Economy

Hypertech Speedometer Calibrator

If you’re looking to improve your vehicle’s performance, you may want to consider a Hypertech Speedometer Calibrator. This device can help optimize your car or truck’s speed and handling, as well as improve fuel economy. Here’s how it works: the Speedometer Calibrator connects to your vehicle’s on-board computer.

Once connected, you can input new data that will change the way your speedometer reads. For example, if you’ve made modifications to your engine that increase its power, you can recalibrate the speedometer so that it reflects this change. In addition to improving performance, the Hypertech Speedometer Calibrator can also help improve fuel economy.

By inputting more accurate data, the device can help your car or truck run more efficiently – meaning you’ll save money at the pump! Whether you’re looking to boost performance or save money on fuel, the Hypertech Speedometer Calibrator is a great choice for anyone interested in getting the most out of their vehicle.

How to Adjust a Speedometer for Larger Tires


Can You Adjust Your Speedometer for Bigger Tires?

If you have ever wondered if you can adjust your speedometer for bigger tires, the answer is yes! There are a few different ways that you can go about doing this, depending on the make and model of your vehicle. One way is to simply enter a new tire size into the speedometer calibration menu of your car’s computer system.

This can usually be found in the vehicle’s owner’s manual. Another way to adjust for bigger tires is to install a GPS-based speed sensor onto the axle of your car. This will allow the speedometer to accurately reflect the speed at which your car is actually traveling, regardless of tire size.

How Do You Calibrate a Speedometer for Different Size Tires?

There are a few different ways that you can calibrate your speedometer for different size tires. One way is to simply measure the circumference of your tires and then input that information into your speedometer. Another way is to use a GPS device to measure the actual speed that you are traveling at and then compare that to the speed that your speedometer is reading.

Whichever method you choose, it is important to be as accurate as possible in order to get an accurate reading from your speedometer.

How Much Do Bigger Tires Affect Speedometer?

There are a few ways to look at how much bigger tires affect speedometer readings. The first is simply the circumference of the tire – a larger tire will have a greater circumference and will therefore rotate more slowly than a smaller tire. This means that for a given speed, the larger tire will cover less distance per revolution than the smaller tire.

This difference in distance covered per revolution can be significant – depending on the size of the tires, it can be as much as 10% or more. This difference will show up as a lower speedometer reading with larger tires. The other factor to consider is gearing.

Most cars are designed with specific gear ratios that are chosen to give an optimal performance at certain speeds. If you change the size of your tires, you effectively change these gear ratios which can end up affecting your car’s performance – both in terms of acceleration and top speed. Generally speaking, though, bigger tires will result in slightly lower speedometer readings without any major impact on performance.

How Much Does It Cost to Recalibrate Speedometer?

Speedometer recalibration is a process that is typically done by automotive professionals when a vehicle’s speedometer becomes inaccurate. The cost of this service can vary depending on the make and model of the vehicle, as well as the severity of the issue. In most cases, speedometer recalibration will cost between $50 and $100.


If you’ve installed larger tires on your vehicle, you’ll need to adjust your speedometer accordingly. Otherwise, you’ll be driving faster than the speed limit without realizing it! Here’s how to do it:

First, find out the new circumference of your tires. You can do this by measuring the diameter of your tire and then multiplying it by 3.14 (pi). Next, divide the new circumference by the old one and multiply that number by your current speedometer reading.

This will give you the correct speedometer reading for your new tires. For example, let’s say you had a 30″ tire, and you replaced it with a 35″ tire. The new circumference would be 35″ x 3.14 = 109.9″.

The old circumference was 30″ x 3.14 = 94.2″. So, 109.9 / 94.2 = 1.1685. And 1.1685 x 30 mph = 35 mph – which is the new speedometer reading you should use with your larger tires!

David V. Williamson

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