Every year in the U.S., tire-related crashes cause 200 fatalities, according to the National Highway Traffic Safety Administration. Thankfully, it’s easy to monitor your tires, and how to tell if you need new tires, with a quick video and some basic information.
The primary functions of the tread on your tires are to grip the road and to divert water that causes hydroplaning. Tires with plenty of tread can help you maintain control and reduce your chances of getting a flat. With a quick monthly check of your tread and tire pressure, you’ll know if you need to replace your tires.
Tread wear bars are small, raised bits of rubber that run between the tread blocks. As these bars become even with the top of the tread, it is likely time for new tires. See more about tread wear bars below.
Tires will wear down over time, even if you don’t drive much. Sunlight, heat, and chemicals used to melt snow and ice can reduce rubber flexibility, causing tires to crack, lose air, and eventually fail.
There are many factors that may cause uneven wear, which could shorten the life of your tires. Vehicle alignment, tire pressure, lack of rotation, and/or worn steering and suspension components can all contribute to this problem. To prolong the life of your tires and reduce uneven wear, consider getting them rotated at consistent intervals. At Les Schwab, we recommend getting them rotated every 5,000 milles. The pros at Les Schwab will also conduct a free visual inspection of your steering and suspension components. Schedule your free, pre-trip safety check today.
All tires deflate slowly over time, usually about 1 PSI (pounds per square inch) per month.
Check yours monthly to keep them properly inflated. If your tires continually lose air or seem to completely deflate without warning, you may need to stop by Les Schwab for tire repair or replacement if necessary. Does the TPMS (Tire Pressure Monitoring System) light often appear on your dash? This could mean your tires have developed a slow, continuous leak.
If you hit a curb, pothole or other obstacle, your tires can develop sidewall bulges due to a break of the inner liner. These bulges can rupture causing a potentially unsafe situation. If you spot a bulge on your tires, get to your nearby Les Schwab and have your tires inspected.
If you experience new vibrations or thumping while driving, it could be a sign that one of your tire/wheel assemblies is out of balance. It could also indicate a suspension issue. Stop by your local Les Schwab and our professionals will check your tires, steering, and suspension.
All tires sold in the United States today have what are called tread wear bars.
The tread wear bars on your tires are there to help you see how much tread you still have. These wear bars are small, raised bars of rubber in the grooves of your tire. Look at the tread pattern and you’ll see these bars running between the tread blocks.
Look at the tread pattern and you’ll see these bars running between the tread blocks. As your tires wear, these bars will become increasingly flush with the tire’s tread. It’s important to replace your tires before this happens.
Depending on where and how you drive, and the conditions you face on the road, you might consider getting new tires before they reach that point. City driving in mild conditions may allow you to wait until the tread is closer to the tread wear bar before replacing your tires. More adverse conditions, such as rain, snow, and unpaved roads, may require you to replace your tires earlier.
An easy way to check the tread on your tires is to do the penny test.
Take a penny and place Lincoln’s head in one of the grooves of the tire tread. If you can see all of Lincoln’s head, it’s time to replace the tire.
If the penny goes in enough that the tire tread is at least as deep as Lincoln’s forehead, your tires are generally considered safe and do not need replacing. Check all four of your tires when conducting the penny test.
You’ll find your next set of tires at Les Schwab. You also find our world-class customer service at a tire shop near you that cares about your safety on the road.
SHOP TIRES
When it comes to checking tire tread, there are a number of methods that can help you know if it’s time to replace a tire. Heavily worn tread will prevent a tire from performing as designed and can lead to unsafe driving conditions. One of the simplest, most common ways to check tread depth requires nothing more than a penny and a few moments of your time.
In the United States, tire tread depth is measured in 32nds of an inch. New tires typically come with 10/32” or 11/32” tread depths, and some truck, SUV and winter tires may have deeper tread depths than other models. The U.S. Department of Transportation recommends replacing tires when they reach 2/32”, and many states legally require tires to be replaced at this depth.
The idea of the penny test is to check whether you’ve hit the 2/32” threshold. Here’s how it works:
Place a penny between the tread ribs on your tire. A “rib” refers to the raised portion of tread that spans the circumference of your tire. Tire tread is composed of several ribs.
Turn the penny so that Lincoln’s head points down into the tread.
See if the top of his head disappears between the ribs. If it does, your tread is still above 2/32” , If you can see his entire head, it may be time to replace the tire because your tread is no longer deep enough.
When performing the penny tire test, remember not only to check each tire, but to check various places around each tire.
Pay special attention to areas that look the most worn. Even if parts of your tread are deeper than 2/32”, you should still replace the tire when any areas fail the penny test.
Consistent wear around the whole tire is normal, but uneven tread wear could be a sign of improper inflation, wheel misalignment, or a variety of other things. If you see uneven tread wear, you should have a technician inspect your vehicle.
A simple way to check your tire tread depth is by using a tread depth gauge. You can find tire tread depth gauges at your local auto parts store. There are many models available, but an inexpensive simple graduated probe gauge will work just fine. All you have to do is stick the probe into a groove in the tread and press the shoulders of the probe flat against the tread block and read the result. All gauges should measure in both 32nds of an inch and millimeters.
Another indicator of worn out tread already lives in your tires themselves.
Every performance, light truck, or medium commercial tire comes equipped with indicator bars (or wear bars) embedded between the tread ribs at 2/32”. They’re there to help you monitor tread depth and make decisions about tire replacement. Just look to see if the tread is flush with the indicator bars. If they are, it’s time to replace the tire.
While the penny tire test does deliver on what it promises – indicating whether tread has reached the legal limit – it may not be the best indicator of whether your tires are safe for the road. Tire performance can diminish significantly before your tread hits 2/32”. Even though the law deems fit for safe driving may not prevent you from hydroplaning or losing control in rainy, slushy conditions. If you think your tires may be close to needing replacement, have them checked out by a licensed mechanic.
It's no secret that during operation a set of tires is subject to wear and over time it has to be replaced with a new one.
But not many people know that tires can already have a tendency to accelerate wear at the acquisition stage. What is the reason for the short life of new wheels?
What should I check when buying new tires?
Below are tips on what to look for and how to proceed when buying new tires. They are pretty simple.
1. Ask about storage conditions
Proper storage of tires in a warehouse is a guarantee of their long service life. If there is an opportunity to get to the warehouse, be sure to use it. Sometimes this can be done at the time of the final stage of issuing tires to the buyer.
If tires are stored:
Then, in this case, it is better to refuse to purchase them. The thing is that as a result of such storage, microcracks, deformation and damage may appear on the rubber.
This is due to the loss of rubber elasticity and the wrong way to preserve tires. If the tires have the listed defects, then it will not last long. Maximum - one or two seasons.
2. You need to look at the date of manufacture
If the wheels were produced more than three years ago at the time of their inspection, then you need to understand that the rubber composition of such tires has already lost some of its useful properties and has lost some of its elasticity. During subsequent operation, insufficient traction and destruction of rubber may be revealed. Although, theoretically, tires can be stored for five to eight years without losing their best qualities.
3. It is necessary to purchase wheels in the center where there is a tire service
In this case, when installing new wheels, hidden defects may be revealed and the seller will not be able to refuse to replace the damaged tire with a new one. In addition, a guarantee is usually given for the work of a tire fitting - within the allotted time, you can come and make a claim regarding the installation of tires.
4. The seller must issue a check
Sometimes this is taken lightly and the check is thrown away. Under no circumstances should this be done. It is the presence of a check that will help to exchange defective tires for a new one.
5. Wash the tread with your fingers
The rubber should not be too soft. The fingers should not fall inward, but only slightly bend the tread - in this case, we can talk about good elasticity, and hence the retained grip properties.
6. Inspect the sidewalls of the tire
They should not have abrasions, let alone cracks/cut fragments. The sidewalls are the bearing part of the tire, and therefore any damage to them can cause an explosion / rupture of the wheel while driving, which is very dangerous.
Result: These simple recommendations can make it easier to choose tires and avoid buying defective ones. However, there is still no absolute panacea for low-quality rubber - the main defects are detected only during operation.
Tires not fresh. As absurd as it may sound, the question of the release date of tires worries some buyers. In garages and tire shops, they answer the question in completely different ways - does the year of rubber production affect the quality of the tire? To be honest, probably not.
Let's figure it out.
How to determine the year of manufacture of rubber? The manufacturer indicates the week and year of manufacture on the tire on the inner circle near the bead ring. 4 numbers in an oval - what we are looking for. For example, 4317 means that the tires left the assembly line in week 43 of 2017. It turns out, around October. In accordance with standards and common sense, you can absolutely safely buy new tires that were released 3-4 years ago. The manufacturer sets a warranty period. Usually it is 5 years. The service life can be much longer.
Yes, many tire manufacturers have tested new tires on par with 3 year olds at their test centers. Michelin's 2018 study received the biggest response. Rubber was tested in Asia, Europe and proved that new and three-year tires are one and the same. The result of the experiment was the advertising campaign “Tyres are not bananas” and the conclusions: three-year-old tires from the warehouse are no different from new ones, and the real life of high-quality tires is up to 10 years from the date of production.
Right. And in their research, Michelin experts spoke only about their tires, subject to strict adherence to the rules for long-term storage. In our country, everyone is guided by the norms and recommendations of GOST. It regulates the period during which the manifestation of defects is excluded - 5 years. During this period, they are considered new and are subject to sale in the usual way.
A visual inspection is sufficient for this. For example, you decide to buy tires in Yekaterinburg or Nizhny Tagil. And you are offered four-year tires, explaining this by the total supply of such a batch to the Urals. Examine each carefully. The main beacons are surface integrity and color.
1. Exclude the presence of microcracks, even single ones - this is an indicator that the rubber has begun to dry for some reason.
2. The color of the tires should be a rich black, without whitish streaks and faded areas.
3. If you really want to, you can try on the wheel at the tire shop at the store. Rubber should remain intact, not give microcracks and require standard balancing.
In 99 cases out of 100, this will be the case. A quality tire may not show signs of aging after 5 years of proper storage. This is only possible with manufacturing defects.
No one has done exact research, but marketing is most likely to blame. In order to stimulate sales of new tires, it is logical to convince the client that it is dangerous to ride on old ones.
Yes. The warranty period of 5 years is the period in which the manufacturer assumes responsibility for possible defects. Moreover, it is calculated with a margin - with the expectation of active operation in a constant mode in difficult road conditions.
