37 Inch Tires on 20 Inch Rims: All You Need to Know

As an avid off-roader, I always look for ways to improve my vehicle’s performance and appearance. One modification that has been gaining popularity in the off-road community is putting 37 inch tires on 20 inch rims. This combination may seem unconventional. After all, most vehicles with 37 inch tires typically have more giant rims to match. But don’t let appearances fool you – there are plenty of benefits to using this setup.

In this article, I’ll go over everything you need to know about running 37 inch tires on 20 inch rims, from the different types of terrain where they excel. So if you’re considering making this modification or just curious about it, read on.

Can You Use 37 Inch Tires on 20 Inch Rims?

Yes, you can use 37 inch tires on 20 inch rims. It is important to note that the larger tire size will affect the overall performance of your vehicle. Larger tires are heavier and have more rolling resistance, meaning they will require more power from your engine to reach the same speeds as smaller tires. Larger tires may not fit in your wheel well or cause rubbing against other vehicle components.

Installing larger tires on smaller rims and checking the manufacturer’s recommended tire sizes for your specific vehicle model is essential. It will ensure that the tire and rim size combination is compatible with your vehicle’s suspension and drivetrain system. You should also consult a professional mechanic to ensure all components are correctly installed and adjusted for optimal performance. If you need more information about 20-inch tires, Before this, I have deeply explained how Can I Fit 33 Inch Tires On 20 Inch Rims? and now we see how we can fit 37 inch Tires on 20 inch Rims?

How to Fit 37 inch Tires on 20 inch Rims?

37 Inch Tires on 20 Inch Rims

Upgrading the tires on your Jeep is a common modification that enhances its performance and transforms the overall look of your vehicle. Fitting 37-inch tires on 20-inch rims might take some work and adjustment to ensure they fit properly. It’s important to note that upgrading tire size can affect other vehicle parts, such as suspension, steering components, and brakes. There are a few things that you need to take into consideration.

More Lift:

It’s important to consider the amount of lift required for proper functioning. Smaller tires require less lift than larger ones, as the increased tire size demands more clearance between the wheel well and the top of the tire. For instance, 33-inch and 35-inch tires typically require at least 1.5 inches and 2.5 inches of lift to function correctly.

Upgrading to even larger tires – such as 37-inch tires – a significant increase in lift is necessary for proper functionality. Vehicles equipped with these larger tires require at least 3.5 inches of lift for optimal performance. Without this added clearance, drivers may experience unstable or uncomfortable rides that make controlling their car more difficult than usual.

New Set of Ring And Pinions:

You must ensure the tires are compatible with your vehicle’s engine. The larger tire size will put more pressure on the engine, which can cause problems if not appropriately addressed.

Investing in a new set of rings and pinions is one way to mitigate this issue. These components work together to provide a better gear ratio for your vehicle. This means that the power from your engine is distributed more evenly throughout all parts of the car, reducing strain on any one area.

Upgrading your ring and pinions can help protect other parts of your engine from failing due to excessive weight and pressure. Ensuring that all components work together seamlessly, you’ll enjoy the benefits of larger wheels without sacrificing performance or safety.

Aftermarket Bumpers:

During the installation process, ensure that your vehicle’s suspension system can handle the weight and size of the new tire. You may need to adjust or upgrade your suspension system depending on the type of vehicle and tire size. Choosing high-quality aftermarket bumpers that provide maximum protection in an accident or collision is also essential.

Remove the old wheels from your car and clean them thoroughly before mounting the new ones. Use a mounting machine to align and balance the tire before fitting it onto the rim.

Extra Cutting:

While most cars come with appropriate cuttings in the body for the factory-designed tires, these may not be sufficient for larger sizes. By making some extra cuts in the right places, you can ensure your new wheels have enough room to move freely.

The cuttings may appear smaller than they are. To ensure the tires function correctly, additional cutting might be necessary. These upgrades are crucial when using 37-inch tires. Considering the aftereffects of using such large tires on 20-inch rims is essential. The bigger size can affect your vehicle’s performance, including steering response and acceleration. Fuel economy may decrease due to increased weight and rolling resistance.

What Happens If You Use 37-inch Tires on 20-inch Rims?

Using 37-inch tires on 20-inch rims is not recommended, as it can cause severe damage to your vehicle. The tire’s rim size must match the wheel’s size for optimal performance and safety. If you used a 37-inch tire on a 20-inch rim, the tire’s sidewalls would be too large for the rim, leading to excessive stress and pressure on the wheel. This could cause the wheels to bend or even break under the strain, leading to an accident.

Operating a tire that is too large for your wheel can also affect your car’s performance. It can cause poor handling and increased wear on other components such as brakes, suspensions, and steering. It can lead to costly repairs down the line if left unchecked. Sticking with tires designed for your specific wheel size is best to ensure maximum performance and safety while driving.

Benefits of Using 37-inch Tires on 20-inch Rims:

Installing 37-inch tires on 20-inch rims has become popular among off-road enthusiasts due to its numerous benefits.

  • It allows drivers to cross obstacles easily. Larger tires provide more ground clearance, allowing drivers to navigate over rocks, ruts, and other obstacles without getting stuck or damaging their vehicle’s undercarriage. This means that off-roaders can explore more challenging terrain confidently and easily, knowing that their vehicle can handle whatever comes it is way.
  • Another benefit is ground clearance than smaller ones. This is handy when driving through rough terrains or rocky areas where smaller tires may get stuck or damaged. The increased height also protects the undercarriage from obstacles such as rocks, logs, and debris that might cause damage to your vehicle.
  • The added aesthetics they bring to your vehicle. The larger size gives your car a more aggressive and rugged look, making it stand out from other vehicles on the road.

Disadvantages of Using 37-inch Tires on 20-inch Rims:

It’s important to note that this upgrade has several disadvantages that might not be worth the investment in the long run.

  • Requires costlier upgrades to accommodate the larger size. This includes modifying the suspension system, installing larger brakes, and adjusting the calibration of the speedometer. These upgrades add to the overall cost and require professional installation, which can lead to additional labor costs.
  • Using such large tires stresses the engine since it has to work harder to move them along. This results in decreased acceleration and slower speeds, which may negatively impact your driving experience.
  • The larger tires require more energy to move, causing your vehicle’s engine to work harder and consume more fuel. As a result, you’ll make more frequent trips to the gas station, which can add up over time.

Final Words:

37 inch tires on 20 inch rims are a popular and bold upgrade for off-road enthusiasts. Before making the switch, it is vital to consider the impact on performance, handling, and overall safety. Proper installation and maintenance are crucial for maximizing the benefits of larger tires. By understanding the mechanics behind this modification and consulting with professionals, drivers can confidently embark on their next adventure with increased capability. Take the time to research and make an informed decision before upgrading to 37 inch tires on 20 inch rims. Happy trails!


What size tire can fit on a 20-inch rim?

It is important to note that the tire must be 20 inches long. It means that any tire with a diameter of 20 inches or less will fit on the rim.