Have you noticed that the tires in your electric car are filled with foam instead of air? These small pieces of foam are added inside the rubber tires to make your experience with electric cars noise-free and smooth.
So, why do Tesla tires have foam in them? Tesla puts foam in their tires for the following reasons:
- To lower the tire’s rolling resistance.
- To reduce the noise.
- To prevent tires from vibrating on uneven roads.
- To make the ride comfortable.
In this article, we will discuss why Tesla adds foam to their car tires. So, let’s get started!
Why Do Tesla Tires Have Foam In Them?
Below, we have discussed why Tesla chose to use polyurethane foam in their car tires.
It allows your car’s tires to roll easily
When tire manufacturers began attaching polyurethane foam to the inner edges of car tires, researchers noticed that it reduced the tire’s rolling resistance.
Also, when the rolling resistance of your car’s tires decreases by 10%, it lowers the energy consumed by the tires by 2%.
Helps to decrease the vibration caused by your car’s tires
When you drive on bumpy roads, it causes your car’s tires to vibrate. This, in turn, causes other components inside your car to vibrate.
To see how foam affects the vibrations produced by car tires, researchers hit tires containing foam with large hammers. They noticed two important things:
- The foam inside the tire works as a vibration absorber.
- The foam’s stiffness is low, so it doesn’t impact the stiffness of your tires.
It reduces the noise made by your car’s tires
According to researchers, the noise from car tires is the main source of interior noise in electric vehicles. To reduce this noise, experts started putting 90mm wide and 20mm thick polyurethane foam into the inner lining of the tires.
Researchers found that tires with composite polyurethane foam absorb sound better than regular tires.
Provides you with a smooth and comfortable ride
Many Tesla users experienced a smoother ride while using tires filled with foam. So, these tires offer you the following benefits:
- They bounce less on bumpy roads.
- They provide better stability on hilly roads.
- You don’t need to worry about fixing punctures in the middle of the road.
- They reduce the whole-body vibration you experience while driving.
What Are The Common Problems Of Using Tires Filled With A Layer Of Foam?
Check out the information below to learn about the typical problems of using tires filled with foam.
It is difficult to find a tire repair shop
It is difficult to find tire repair shops that are willing to fix damaged tires filled with foam. This is because it is more profitable for mechanics to suggest you buy new tires than to spend extra time cutting out the old foam and gluing in new foam.
These tires are costly
It will cost you around $25-$75 to fix a punctured tire. However, once the foam inside your car tires wears out, it will cost around $800-$900 to replace all the tires in your car.
The layer of foam often becomes loose
Look at the picture we have provided above. Here, you can see that the long strip of foam has completely come off from the tire.
Many Tesla users have reported that these foams are not properly glued to the inside of the tires. Thus, they tend to come off when the tires are exposed to high heat and mechanical force.
How Can You Repair Tires That Have Foam Inside Them?
Below, we have given a step-by-step guide that will help you repair damaged tires that contain foam.
Step 1: Remove the tires from your Tesla and check these areas:
- The sidewalls.
- The tread area.
- The inside of the tires.
If you don’t see any cracks larger than 6mm, exposed cables, or signs of corrosion, you can proceed forward.
Step 2: Use a sharp knife to cut approximately 2 inches of the foam above and below the damaged area.
Step 3: Take out this section of foam from your tire.
Step 4: Now, use a tire inspection tool to accurately measure the size and angle of the damage.
Step 5: Use a tire cleaning solution and a rubber scraper to remove accumulated dirt and dried glue from the damaged area of the tire.
Step 6: Use a marker to trace around the damaged area. It will help you install the repair seal in the correct spot.
Step 7: Take a buffing tool and set it at a low speed(below 5000 rpm)
Step 8: Buff the marked area with the buffing tool.
Step 9: Use a drilling machine to remove the damaged section from the tire.
Step 10: Now, use a brush to clean the leftover dust and steel shavings.
Step 11: Apply vulcanizing fluid around the damaged area and let it dry.
Step 12: Take the repair seal and peel off the blue sticker from its back.
Step 13: Apply pressure and insert the seal into the damaged section of the tire.
Step 14: Now. cut off the stem attached to the seal from the outside of the tire.
Step 15: Apply glue around the sealed area, place a new piece of foam over it, and let it dry.
For a visual representation of this process, watch this YouTube video.
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FAQs
Check out these FAQs to learn why Tesla puts foam inside their tires.
Yes, the foam that Tesla uses in their tires is typically made from polyurethane. As a result, it doesn’t harm the environment and can be recycled.
Foam is added to car tires to reduce the noise produced by the tires and give you a smooth ride. Therefore, it doesn’t have a significant impact on the traction of your car’s tires.
Final Words
Overall, Tesla began installing polyurethane foam inside their car tires after users complained about tire noise inside the car cabin. The foam helps to decrease the noise and vibration typically generated by tires on bumpy roads. Additionally, the foam inside the tires absorbs more shock compared to tires filled with air. Thus, riders experience
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