Treadwear bars are one of the key features when it comes to gauging the level of wear and tear that has taken place. It can be tough to know when it is time to replace tires as well, which is why these tread wear bars are of the utmost importance.
However, there are some common questions about the wear bar that need to be answered, so that a motorist can make the most informed decisions possible.
Do all tires have wear bars?
Not all tires have wear bars. However, there are other ways for the motorist to monitor how much tread is left. When there are no wear bars you can utilize the indicator dimples. These are located in certain positions on the ribs and tread blocks of the tire.
Wear bars and indicator dimples may not look the same but they serve the same function.
They will both let the motorist know when it is time to change the tire. Does the bottom of the dimple in question sit nearly flush with the tire tread?
If so, a replacement is necessary.
Where are the tire wear bars located?
Check between the ribs of the tire to locate the wear bars.
Bear in mind that they are going to be located at different positions on each tire.
There are six or more locations where they can be found on the tire, so do not be discouraged if they are not immediately visible.
Performance tires and aggressive tread patterns can make it hard to find the tire wear bars. The wide ribs and narrow grooves will often obscure them and they will be smaller in these instances.
The motorist may have to position themselves a certain way so that they can scan the tire properly.
Are there other ways to check tread depth?
Tire wear bars are a great way to keep a closer eye on tread depth, but there are other ways to go about this task. There is no denying the convenience, but there is one key fact to bear in mind.
The wear bars will sit around 2/32 of an inch from the bottom of the groove.
Due to manufacturing imperfections, the location of the wear bars can also vary. Fortunately, there are two simple alternatives available.
One will involve the usage of a penny, others may prefer to utilize a quarter instead.
Lincoln’s head just so happens to rest roughly 2/32 inches away from the edge of the penny, making the penny method a perfect way to check the depth of the tread.
Place the penny in the groove of the tire, with Lincoln’s head facing inward. Does the tread cover Lincoln? If so, all is well. If not, it is time to swap the tire out.
If the penny does not provide enough of an indication that the grooves are worn down, the quarter test can serve as a viable substitute.
The motorist does not have to be an expert when it comes to proper tire tread, either.
The test is that simple! If you take a quarter and turn it upside down, the distance from its edge to the top of George Washington’s head is about 4/32nds of an inch.
Put the quarter headfirst into the tire’s grooves.
The tire should cover Washington’s head and if it does not? It is time for a change.
Using a Tread Depth Gauge
A tread depth gauge is one of the best ways to ensure proper tire performance.
Some will choose to obtain a tread depth gauge because they believe that these tools will provide them with a more accurate depiction of their current tread depth situation.
The precision that these gauges have to offer is second to none. Fortunately, they can be had for just a few dollars from the local automotive store.
If one of these gauges is not readily available and the motorist still wants a precise measurement, rulers are available.
Be sure to choose one that measures in 1/16th inch increments.
¨Take the ruler and place it into one of the tire’s grooves. From there, measure from the base of the tread up until its current level. If the tire measures at 1/16 of an inch or below, this means that it is time to be replaced.
What’s the best tire tread depth?
Anything over 2/32 inches of tread is considered good.
However, it is also important to note that this is a bare minimum that should be adhered to. 2/32 inches does not mean that the tires are good to go. It means that they are on the verge of needing a replacement.
Don’t make the mistake of waiting any longer from there. Otherwise, the wear and tear will continue to build up, leading to adverse driving situations.
The best practice is to replace the tires once the tread is down the 4/32 inches.
If the tread is any deeper than that, all is well and there is nothing to worry about at the moment. Once the tires have reached 4/32 of an inch, the small grooves in the tire (known as sipes) will start to wear away.
Moisture is no longer whisked away and tire performance is compromised.
Why are wear bars so necessary?
Of course, these wear bars serve as a great visual indicator, but that is not all that they can do. They also perform a number of functional tasks.
For starters, the wear bars are located between the tread elements.
This means that they are responsible for securing the tire tread during each trip.
The reduction of flexing and tread movement during these trips is very important. This also increases the performance ability of the tires by significantly improving the level of traction. For those who are traveling in wintry conditions, this level of performance could not be more crucial.
Without the reduction in flexing and tread movement, the tires will not have the same level of surface grip. Cornering and braking abilities are also greatly improved, which cannot be discounted.
Worn tires, on the other hand, are not going to have the performance abilities.
Telltale Signs of Tire Damage
Tire damage has a way of announcing itself during the moments when it is least expected. That’s why it pays for a motorist to be as proactive as possible in this regard.
When it comes time to measure the tread, there are a few things to look out for.
For example, make sure that there is no scalloping or cupping taking place.
This is when small divots or scoops have been carved out of the tire’s tread. If these scoops are found, this means that there is some serious misalignment going on that needs to be addressed.
Bigger problems could also be taking place and it is time to take the car to a service center.
The same is true if there are bulges in the tread of the tire or the sidewall. A new tire will be required, at a minimum.
How To Reduce Tire Tread
Everyone wants to make sure that their tires last longer and it is a very common impulse.
After all, who is looking to spend big money on replacements every single time they look up?
That’s why these tips and pointers are highly valuable when it comes to reducing the wear and tear on tires.
Maintaining Proper Tire Pressure
Tires are always going to lose air pressure over the course of time, no matter what a motorist tries to do about it. That’s why maintaining proper tire pressure is pivotal.
When the tires are properly inflated, force is evenly distributed from the vehicle to the roadway.
If not, the tires are not going to be able to make proper contact with the roads. The tread will then start to wear away in an uneven manner.
For best results, the tire pressure should be checked on a monthly basis. Check before longer trips or carrying heavier loads, too.
The vehicle’s owner’s manual tells the driver whatever they need to know.
Regular tire rotation also plays a key role that cannot be forgotten.
If the tires are not rotated on a regular basis, they will wear out far more quickly. The front tires are always going to wear out far more quickly than the back tires, which is important to bear in mind.
The back tires simply do not take the brunt of the stopping and steering force during daily drives.
They are able to last a bit longer as a result. That’s why they need to be rotated consistently. This ensures far more even levels of wear and tear.
Check our article here on if you should balance wheels for every rotation.
Practicing Proper Driving Habits
In many instances, a motorist will never stop to consider their own driving habits and the effect that they can have on tire maintenance.
No, a motorist cannot avoid wear and tear on their tires entirely just by practicing safe driving habits. The effects are rather pronounced, though.
Something as simple as taking curves at the proper rate of speed can make all the difference in the world.
The edges of the front tires will wear out far more quickly when the motorist is zooming around each corner like a NASCAR driver in training.
Potholes are another common issue that will cause expedited wear and tear and should be avoided at all costs.
Even one pothole collision can throw the whole wheel alignment out of whack. It is important to travel at a normal rate of speed and remain alert at all times.
Pay close attention to items that are strewn in the road as well, as these random forms of debris can also cause major tire damage.
Regularly Monitoring The Vehicle’s Wheel Alignment
Wheel alignment must be monitored consistently, as well as the suspension.
Worn and/or damaged suspension can cause massive issues that are very costly to address over the long haul. By taking a proactive approach to the vehicle’s wheel alignment, a motorist is able to sidestep some of the most common pitfalls that take place.
When the tires are being rotated, this is the perfect time to check out the wheel alignment as well.
Proper wheel alignment makes the tires last longer, significantly increases the level of driving safety and offers a much smoother ride to all parties involved.
It can be hard to know when the vehicle is due for an alignment, though.
Luckily, there are a few telltale signs to watch out for. Once the driver feels a vibration in their seat or notices an out-of-balance steering wheel, these are both signs that they are overdue for an alignment.
Tire wear bars: Is it time to change your tires?
Penny tire test and quarter tire test
What are tire wear bars and what do they do?
Tire wear bars: what are they and how to read them?
The importance of tire tread depth