How to Check Gear Ratio by Spinning the Tire

Having the right gear ratio is essential for any vehicle, as it optimizes the power and torque potential coming from an engine. Without this, you may find that your car isn’t accelerating properly or even behaving erratically in different conditions. 

Fortunately, there is a simple way to check if your gear ratio is correct—by spinning the tires! Checking gear ratio by spinning a tire requires no specialist tools and can be done in just minutes.

How to Check Gear Ratio by Spinning the Tire

In this blog post, we’ll break down how to spin-test your car tires and easily determine whether or not your current ratios are working as intended. Read on to learn all about how to check gear ratio by spinning the tire

9 Best Ways on How to Check Gear Ratio by Spinning the Tire

1. Start the Car and Place It in Neutral:

Since you’ll be spinning the tires, you’ll want to make sure your car is securely off the ground either jacking it up with a jack or placing it under its wheels. Doing so prevents any further wear on your vehicle as you spin the tire. Once your car is securely lifted, start the engine and put the transmission in neutral.

2. Engage the Parking Brake:

Put on your parking brake before you begin spinning the tires to ensure that no harm comes to either yourself or your vehicle. This will also help keep everything in place while you measure and record the tire’s behavior.

3. Measure the Tire Revolution:

Place a mark on the side of your tire and count how many times it goes around in one minute. The number you get will indicate the gear ratio, as a higher number means that there is less torque while lower numbers provide more power. 

4. Rinse and Repeat:

Repeat the process on the other three tires of your vehicle. Remember to always place a mark and count how many times each tire goes around in one minute. This will help you get an average of the four measurements and give you a more accurate measure of your gear ratio.

5. Record Your Data: 

It’s important to record all of your data so that you can better analyze and compare it in the future. Recording each tire’s revolutions will give you a more accurate reading and make sure that any changes you make are reflected accurately. Recording your data is also important in case you have to take the vehicle to a mechanic in the future.

6. Set Your Gear Ratio:

Once you have recorded your data, it’s time to set your gear ratio. Ideally, you want a ratio that is equal across all four tires. This will help ensure that each tire is functioning correctly and can deliver optimal power and performance. For setting your gear ratio, consult your vehicle’s user manual or contact a certified mechanic.

Car is Securely Off the Ground Either Jacking It Up

7. Make Adjustments:

If the data you recorded showed unequal ratios between your tires, then it’s time to make some adjustments. You can do this by changing the gear ratios on your vehicle or manually adjusting the tire revolutions. However, it’s important to note that any changes you make must be done in consultation with a professional for safety reasons.

8. Check to See if It Works:

Once you have made all of your adjustments, it’s time to see if your gear ratio is working as intended. To do this, spin the tires again and make sure that the revolutions are equal across all four of them. While checking the revolutions, also make sure that there is no slipping or grinding as this could indicate a potential problem with your gear ratio.

9. Test Drive:

The final step is to test your car out on the road. Doing so will give you a better idea of how it’s performing and if any further adjustments need to be made. This also helps ensure that your gear ratio is properly set and working optimally.

By following these steps, you can easily check and maintain your gear ratio by spinning the tire. Doing so ensures that your vehicle is always performing at its best and can handle any situation without fail. 

Keep in mind that any changes you make should be done in consultation with a professional for safety reasons. Doing so will help ensure that your car is running optimally and that you are always safe on the road.

Additional Tips and Tricks to Check Hear Ratio by Spinning the Tire

1. Make sure the tire is inflated to the correct manufacturer’s specifications before spinning it. If it is not, your results may be inaccurate.

Place a Mark on the Side of Your Tire

2. Use chalk or some other type of marking on the tire and a stationary object such as a wall to keep track of how many full rotations were made while the tire was spinning. This can be very helpful in quickly determining the gear ratio.

3. If possible, make sure that the drive shaft is free of any obstructions before spinning the tire so as not to interfere with its rotations.

4. When spinning one of the tires, ensure that all four tires are moving freely and no brakes are being applied. Having brakes applied to any tire while spinning the other one can cause false readings of the gear ratio.

5. If you are measuring a differential gear ratio, be sure to spin both wheels simultaneously in order to get an accurate result.

6. Make sure that all measurements taken with this technique are written down and kept for reference – this will help you to keep track of the gear ratios on your vehicle and make sure that they are in optimal condition.

With the tips and tricks described above, you should have no problem accurately checking the gear ratio by spinning the tire. Make sure to use the appropriate safety measures and double-check your results for accuracy before relying on them. Good luck!

Precautions Need to Follow for Checking Gear Ratio by Spinning the Tire

1. Make sure to do the process in a well-ventilated area as it can generate fumes from the tire spinning.

2. Always wear safety glasses and protective gloves before handling any objects, including tires.

3. Secure the car on ramps or jack stands before beginning the procedure so that it doesn’t move while you are working on it.

4. Keep your hands away from the tire while it is spinning to avoid any potential injuries.

5. Do not spin the tire for too long as it can wear out the bearing or cause damage to other components in the car.

6. Clean the surface of the tire before beginning to ensure that there are no foreign objects on the tire that could affect the accuracy of your measurements.

7. Make sure to measure the circumference of the tire before spinning it, as well as after, to get an accurate measurement for comparison.

8. If you suspect any problems with the gear ratio or any other component in your car, contact a professional mechanic for assistance. They will be able to diagnose the issue and replace any defective parts if necessary.

Contact a Professional Mechanic for Assistance

With the right safety precautions and careful measurements, you can easily check the gear ratio in your car by spinning the tire. This will give you a better understanding of how your car is performing so that you can make modifications as necessary to ensure optimal performance.

Frequently Asked Questions

What is Gear Ratio? 

Gear ratio is the ratio of teeth between two gears or shafts in an engine. It is important to know the gear ratio of your vehicle because it affects how quickly and efficiently the engine can transfer energy, which determines your vehicle’s performance.

Why Should I Check My Gear Ratio? 

Checking your gear ratio is important because it helps you determine if your engine is running efficiently. If the gear ratio is off, then it can lead to a decrease in performance and fuel economy. Additionally, if the gear ratio is incorrect, it can cause excessive wear on the gears and other components in the engine.

How Can I Check My Gear Ratio? 

The simplest way to check your gear ratio is to spin the tires of your vehicle. To do this, you will need a jack and jack stands to lift the vehicle off the ground, as well as an angle protractor or inclinometer. With these tools, you can spin the tires and check their rotations against each other. If they are not rotating at the same speed, then your gear ratio is likely off.

Always Wear Safety Glasses and Protective Gloves


Knowing how to check gear ratio by spinning the tire is an essential skill to have if you want to ensure your vehicle runs at peak performance and efficiency.

By following the steps outlined above, you can easily determine if there are any issues with your gear ratio and take steps to fix them. With regular maintenance, you can make sure that your engine continues to run optimally for years to come.

You Can Check It Out to Insulate Sliding Glass Doors

Louis Wein

Louis Wein

Louis has always been fascinated by cars. He loves the way they look, the sound of the engine, and how they make him feel when he's driving. He is always keen to learn more about different mechanics of cars and how the engine contributes to other aspects of the car. As an automotive technician with over 10 years of experience, he knew how they worked and loved taking them apart to see how they went back together. He was especially interested in the mechanics of combustion engines and loved finding ways to make them more efficient. He loves to work on cars and help people keep their vehicles running smoothly. As a senior editor, he enjoys contributing to Diy quickly because it allows him to share his knowledge and expertise with others.

We will be happy to hear your thoughts

Leave a reply

DIY Quickly