How to Adjust Speedometer for Bigger Tires? | Tips

If you have recently installed bigger tires on your vehicle, you may have noticed that your speedometer is no longer accurate. This is because the larger tires cause your car to travel a greater distance in one revolution than it did with the smaller tires. As a result, your speedometer will read lower than your actual speed.

While this may not be a big deal on the open road, it can be an issue when driving in town where posted speeds are strictly enforced. Fortunately, there is an easy fix for this problem.

  • Park your car on a level surface and turn off the engine
  • Jack up one side of the car so that the tire you’re going to adjust is off the ground
  • Locate the speedometer cable where it enters the transmission housing on the side of the vehicle opposite the jack stand.
  • Unscrew the locking nut on top of the speedometer cable using pliers or an adjustable wrench, then pull the cable out of its housing about 3 inches.
  • Wrap electrical tape around the end of the speedometer cable until it’s slightly thicker than it was before, then reinsert it into the housing and screw the locking nut back on tightly
  • Lower the car back down to the ground and test drive to see if the speedometer reads accurately

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

How to Adjust Speedometer for Bigger Tires Tacoma?

If you have a Tacoma and you’re looking to adjust your speedometer for bigger tires, there are a few things you’ll need to do. First, determine the new tire size. Second, find the circumference of the new tires.

To do this, measure the distance around the tire from one side to the other. Multiply this number by 2 to get the circumference. Once you have both of these numbers, plug them into this formula: MPH = RPM x Tire Circumference / Gear Ratio x 336 This will give you your new speedometer reading in MPH.

If you drive a Tacoma with bigger tires, it’s important to adjust your speedometer so that it’s accurate. Otherwise, you could end up speeding without realizing it. Thankfully, adjusting your speedometer is relatively simple – all you need is the new tire size and circumference.

With those numbers in hand, plug them into a simple formula, and voila! You’ve got your new speedo reading.

Bigger Tires Speedometer Calculator

If you’re looking to upgrade your tires, one of the first questions you’ll ask is, “what size should I get?” But after that, you’ll also want to know how those bigger tires will affect your speedometer and odometer readings. To help with that decision-making process, we’ve put together this Bigger Tires Speedometer Calculator.

Just enter the original tire size, desired tire size, and gear ratio. Then click calculate, and you’ll see what effect the new tires will have on your speedometer reading. You can even enter multiple tire sizes to see how they compare!

So whether you’re just trying to figure out what size to get or do some comparison shopping, this calculator will come in handy. Now that you have an idea of what size tires you want, it’s time to start shopping around! Be sure to check out our selection of big brand names tires like Michelin, Goodyear, and BFGoodrich.

We’ve got a wide variety of sizes and styles to choose from, so finding the perfect set of wheels for your car or truck has never been easier.

How to Adjust Speedometer for Bigger Tires Ram 1500?

If you have recently installed bigger tires on your Ram 1500, you may have noticed that your speedometer is no longer accurate. This is because the stock tires on your truck are a different size than the new ones, and as a result, the speedometer needs to be recalibrated. Don’t worry – it’s an easy process that anyone can do with just a few tools and some patience.

First, you’ll need to find out the circumference of both your old and new tires. You can do this by measuring the diameter of each tire (from one end of the tread to the other) and then multiplying by pi (3.14). Once you have both numbers, simply divide the circumference of the new tires by that of the old ones – this will give you your factor.

For example, if your old tires had a circumference of 100″ and your new ones measured 120″, then your factor would be 1.2 (120/100). Next, locate the speedometer calibration button on your Ram 1500 – it should be on or near the instrument cluster. Once you’ve found it, press and hold down for approximately 5 seconds until “CAL” appears on display.

Then, use either a handheld GPS unit or a phone app to drive at a constant speed for 1 mile while keeping an eye on both readouts. At the end of that mile, note down what reading your GPS unit or app shown; this is now your baseline speed. To adjust for bigger tires, multiply that number by your factor (1.2 in our example above).

So in our hypothetical case, if we drove at 60 mph according to our GPS unit or app, we would now input 72 mph into our truck’s speedometer calibration button (60 x 1.2 = 72). After doing so, our speedometer should now be displayed correctly regardless of which size tires we have installed!

Speedometer Calibration Calculator

If you’re like most people, you probably don’t think too much about your car’s speedometer. But if it’s not accurate, it can be a real pain – especially if you get pulled over for speeding! Fortunately, there’s an easy way to calibrate your speedometer so that it’s as accurate as possible.

The first step is to find out the actual circumference of your tires. You can do this by measuring the diameter of your tires and multiplying by 3.14 (pi). Once you have this number, simply enter it into our Speedometer Calibration Calculator.

Next, you’ll need to know the distance that your vehicle travels in one mile. The easiest way to do this is to drive on a flat, straight road for one mile while keeping track of how long it takes you to travel that distance. Then, simply enter the time into our calculator.

Once you’ve entered both pieces of information, our calculator will tell you what your speedometer reading should be at 60 miles per hour. Simply adjust your speedometer until it matches this reading and you’re all set!

How to Adjust Speedometer for Bigger Tires


Can You Calibrate the Speedometer for Bigger Tires?

If you have bigger tires on your car, you may need to calibrate your speedometer so that it is accurate. This is because bigger tires will make the car go faster than with smaller tires. To calibrate the speedometer, you will need to find a stretch of road where you can drive at a constant speed for a mile or more.

Then, using a GPS system or phone app, measure how long it takes you to travel that mile. Finally, compare this time to what your speedometer says and adjust accordingly.

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. The most common way is to use a GPS system. You can also use a handheld device like a smartphone or a tablet.

If you have access to the internet, you can also use online calculators. To calibrate using a GPS system, first, find a straight stretch of road where you can drive at a consistent speed. Then, set your cruise control to the speed limit and turn on your GPS system.

Once it has acquired a signal, drive for 1 mile while keeping an eye on the GPS reading. Compare the reading to your speedometer and adjust accordingly. If you’re using a handheld device, start by downloading an app that will help with the calculation.

There are many available, so choose one that looks reputable and is easy to use. Then, enter the size of your tires and select “calculate.” After following the prompts, compare the new setting with your speedometer and make any necessary adjustments.

Finally, if you’re using an online calculator, simply enter in the information about your tires and vehicle into the appropriate fields. The calculator will do all of the work for you and provide you with an accurate setting for your speedometer calibration.

How Much Do Bigger Tires Affect Speedometer?

Bigger tires can affect the speedometer in a few ways. First, bigger tires will make the vehicle appear to be going slower than it actually is. This is because the circumference of the tire is larger, and therefore, it takes longer to make one full revolution.

Second, when bigger tires are installed, the odometer will no longer be accurate and will read less mileage than has been driven.

Read Another Post: How To Adjust Rear Wheel Alignment? | A Comprehensive Guide

How Do You Calculate Speed With Bigger Tires?

If you have ever wondered how those big trucks manage to go so fast despite their large size, it is because they have bigger tires. Bigger tires mean more contact area with the ground and, therefore, more traction. More traction means that the truck can accelerate faster and reach higher speeds.

To calculate the speed of a vehicle with bigger tires, you need to take into account the circumference of the tire. The circumference is the distance around the outside of the tire. A larger circumference means that each revolution of the tire covers more ground, and therefore the vehicle can travel further in a given amount of time.

To calculate the circumference, you need to know the diameter of the tire (the distance across it) and then use this formula: C = π x D. Now that you know the circumference, you can use this formula to calculate speed: S = C/t. In this formula, S is speed, C is circumference, and t is time (measured in seconds).

So if we know that a truck’s tires have a diameter of 3 feet and we want to find out its speed in miles per hour, we would plug those numbers into our equation like this: S = (3.14 x 3)/3600. This gives us a speed of 0.04 miles per hour – not very fast! But remember, this is just for one revolution of the tire – once the truck gets going, it will cover much more ground with each revolution and therefore reach much higher speeds.


If you have bigger tires on your car, you need to adjust the speedometer so it reflects the correct speed. Otherwise, you’ll be going faster than what the speedometer says. To do this, you’ll need to recalibrate the speedometer following these steps:

1. Find out the circumference of your new tires. You can do this by measuring the diameter of the tire and multiplying it by 3.14 (pi).

2. Once you have the circumference, divide it by 1000 to convert it to kilometers.

3. Next, find out your old tire’s circumference in kilometers using the same method described above.

4. To calculate the new reading on your speedometer, divide your new tire’s circumference by your old tire’s circumference and multiply that number by your car’s current reading (in kilometers). This will give you the actual speed you’re traveling at with your new tires.

David V. Williamson

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