If you miss a slip sign, will you not get to the vehicle inspection?Introducing tips to prevent tire wear

One of the items to be inspected during the vehicle inspection is the "slip sign".This is a mark that tells you the degree of tire wear, and if you miss it, you will not only be able to pass the vehicle inspection, but also lead to serious accidents.

Therefore, we will introduce the way to prevent the slip sign and the passing criteria for vehicle inspection, tips for preventing tire wear, replacement time, and checkpoints for tires other than slip sign.

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[Points of this article] ✔ The slip sign appears when the tires are worn down, the mark that indicates the passing standard of the vehicle inspection.If you want to maintain, car lease is recommended

"Slip sign" which is the criterion for passing the tire groove by vehicle inspection

The purpose of the car inspection is to find out if the car has sufficient performance to drive safely, but the tires are strictly checked as important parts.The condition of the tire groove is also one of the test items, and the "slip sign" is a sign that indicates the passing standard.

Here, we will explain how to look at slip signs and the criteria for passing the vehicle inspection.

Where is the slip sign?

First, let's check where the slip sign is the passing standard for vehicle inspection.Looking at the side of the tire, "Side Wall", there are several triangular marks.The swelling part of the groove at the end of this mark is a slip sign.

Generally, 4 to 9 of the tread is attached, so you can easily find it by looking for a triangle mark on one tire.

What is the passing criteria for vehicle inspection?

In the case of a passenger car, the new tire groove has a depth of around 8mm, but the tires are gradually reduced by driving, so the grooves become shallow.

As a result of worn out, the depth of the tire groove is 1.When it reaches 6mm, a slip sign appears on the surface of the tire.Tires in such a state cannot pass the vehicle inspection because the security standards of road transport vehicles cannot be met.In other words, tires that have been worn until the groove is the same as the slip sign requires replacement.

Note that the tires that have slipped in one place in one place are not passed by the vehicle inspection.

Differences in passing criteria for trucks and buses

In the vehicle inspection, the depth of the tire groove has a clear passage, depending on the model, and it also depends on the general road and the highway.1 I mentioned earlier.6mm is a passenger car and a light truck, and the depth of the groove on both general roads and expressways..It will be 6mm.

On the other hand, small trucks are 1 on general roads..It is 6mm, but on the highway 2.4mm.Large trucks and buses are also 1 on general roads.It is 6mm, but on the highway 3.It will be 2mm.

This is stipulated in this way due to the weight of vehicles, including luggage and passengers, and the burden on tires associated with high -speed driving.

How to measure the depth of the tire groove

When checking how much the tire groove is decreasing, you should use a tire groove gauge sold at car supply stores.

It is easy to use, just apply the tire groove gauge to match the groove of the tire, slide the gauge, and read the scale.However, avoid the position of the slip sign and measure.You can also easily measure the depth of the tire grooves by using ordinary tools, which are ordinary tools.

Studless tires have "platform"

In winter, in winter, you must take non -slip measures such as studless tires and tire chains when driving on snow and freezing roads.

Studless tires are tires that capture slippery roads such as ice and snow, and run safely, but studless tires also have a seal called "platform" in addition to slip signs.

The platform comes out when the depth of the groove is less than 50 %, but the tires with this mark are more likely to slip, so they cannot be used as winter tires.However, the passing criteria for the vehicle inspection will be a slip sign like normal tires.

Reasons for inspection of slip signs in vehicle inspection

In the vehicle inspection, the criterion for passing the tire groove is 1.It is determined to be 6mm, but what kind of problems will occur in the tires below it?Here, we will explain safety issues and legal issues.

A major problem with safety, such as hydroplaning phenomena in rainy weather

The grooves and cuts on the part where the tires are in contact with the road surface include performance such as the driving force and braking force of the tire, improving heat dissipation, and improving the stability of the car.Therefore, if the tire groove becomes shallow, the brake performance and handling performance will be reduced, which will have a significant effect on the safety of driving.

Also, if the tire groove becomes shallow, there is a danger of being hit by the "hydroplaning phenomenon" when running on a rainy day.This is a phenomenon in which the tire is floating when the tire and the road surface are formed between the tires and the road surface when driving at high speed on a wet road surface, and the handle and brake cannot be controlled.It could lead to an accident.

The groove of the tire plays the role of drainage ditch in rainy weather, so if the groove becomes shallow, this function will decrease.As a result, hydroplaning phenomena are more likely to occur.

If left unattended, it will violate the Road Traffic Law

Since the condition of the tire is related to the safety of the car, security standards are set by the Road Transport Vehicle Law.Tires with slip signs do not comply with security standards, so if you drive on public roads, you will be considered poor maintenance and violate the Road Traffic Law.

Two points will be added as a violation number, and in the case of ordinary cars, 9,000 yen will be imposed.

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Causes and types of tires.

Leaving the slip sign as it is will make it difficult to drive safely, which will violate the Road Traffic Law.Slip signs appear when the tires are worn, but tires have several causes, which are different in tires.

Tire wear can be roughly divided and can be classified into the following three types.Let's look at each.

Shoulder wear

Shoulder wear is a phenomenon in which both shoulders are worn faster than the center part of the tire.If you run with a lack of air pressure on the tire, the shoulder part on both sides will slow down quickly, so you can prevent this by checking the air pressure regularly and filling it.

In addition, if the load is excessive due to overloading on the vehicle, or if a sudden curve is cut off at an unreasonable speed, shoulder wear is likely to occur.

Center wear

Contrary to shoulder wear, the center wear is in the state in which the center part wears faster than the shoulder part.A major cause is the excess of the tire pressure of the tire, and by running with high air pressure, the swelling center is worn quickly.Perform regular inspections like shoulder wear and adjust the air pressure to prevent them.

One -sided wear

One -sided wear refers to a state in which one side of the shoulder is worn quickly.

The cause of the wheel alignment is considered as a cause.Wheel alignment is the angle of the wheels to the body, and even if it runs straight when it tilts inside or outside the tire, only one shoulder wears it quickly.

This can prevent this by implementing the alignment of the vehicle and returning the deviation of how to attach the wheel to a normal state.Also, even if a sudden curve is cut off at an unreasonable speed, one -sided wear is likely to occur.

To minimize the wear of the tires and make it last longer

Tire wear varies depending on the cause.So what do you usually pay attention to in order to reduce the wear of tires as much as possible?Here, we will also introduce how to keep the tires longer, along with the way of driving and maintenance.

Be careful not to overstate the "sudden" movement and speed

"Sudden" driving movements such as sudden starts, sudden stops, and steep steering wheels are heavy burden on the tires, causing the tires to be worn quickly.Also, too much speed can cause tire wear.

Rough driving, such as a "steep" operation or too fast, is not recommended not only in tire wear but also in terms of safety.

By taking a sufficient distance between vehicles, it avoids the "sudden" movement, and operates while keeping a certain speed as possible within the range of the speed limit.By keeping these safe driving in mind, you can minimize tire wear.

Adjust air pressure

As mentioned earlier, if the air pressure of the tires is not enough, the shoulder part of the tire will be worn quickly, and if the air pressure is too high, the center part will be worn quickly.

Tire pressure is reduced by about 5 to 10 % per month even if you run normally, so be sure to check the air pressure regularly and maintain appropriate air pressure.Also, if heavy luggage is loaded, the decrease rate will be even higher, so it is important not to load too much luggage in the car on a daily basis.

Adjust the alignment

It is as mentioned earlier that one -sided wear will occur if the wheel alignment is shifted.The wheel alignment is translated directly in terms of "alignment of wheels", and adjusting this means adjusting the condition of the wheel.

You can recover the correct balance by checking what angle the wheel is attached to the body, and if it is off, adjusted.It is important to check on a regular basis, as alignment may gradually shift by driving.

Rotate

The speed of wearing the tire depends on the position where it is worn.For example, the speed of wear varies depending on the drive system, and the front -wheel drive FF vehicles generally wear the front tire and the rear wheel drive FR cars are generally worn quickly.

Also, depending on how you use the car and the habit of driving, the power and movement of the tire will change, so the speed of wear may differ depending on the mounting position.

Therefore, it is effective to "rotate" and replace the position of the tire to make the tire wear uniform.As a guide, if you drive about 5,000 km, you can replace the tire mounting position so that you can balance the wearing condition to extend the life of the tire.

Watch out for storage methods

In addition to keeping tires as much as possible during driving, you can make the tire last longer by paying attention to how to store it.

Rubber products deteriorate due to ultraviolet rays, so if you expose them to sunlight for a long time, cracks will occur on the surface.Since water is not good inside the tires, the storage area is suitable for sunlight and airy garages and rooms that do not hit rain.

In addition, removing air does not burden the rubber, so it can reduce deterioration and cracks.The way to put it is to put it on a single tire, and if it comes with a wheel, it is better to keep the air pressure about half and pile up horizontally.

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What are the tires to be aware of in the vehicle inspection other than slip sign?

If the tires are worn out and slip signs appear, you will not be able to pass the vehicle inspection.Then, are there any other points that you need to be careful about to pass the car inspection besides wearing tires?You need to be careful about the following tires:

Tires with cracks and scratches

If the rubber of the tire deteriorates, it will be more likely to cause cracks or scratches.If cracks and scratches are large, tires are considered to have a decrease in strength, so it can be said that there is a high risk of bursting (bursting) in contact with something while driving.

If a burst occurs, you will not be able to control the car, so in some cases it may lead to a major accident, which is very dangerous.In a vehicle inspection, it does not mean that there is no crack or scratch of the tires, but it is better to be careful because there are large things that do not pass.

Transformed tires

If the tire is parked on the ground without riding a car for a long period of time, or if the tire deteriorates due to poor environment when storing, the rubber of the tire occurs and the tire is distorted and the deformation is transformed.May appear.If the tires are deformed, the sounds of the handle and engine will cause abnormalities and bursts are more likely to occur, which can be very dangerous because of the accident.These deformation of tires will not naturally return, so if you notice a little distortion, you should be careful, and if you notice it, it is better to have a maintenance company look at it as soon as possible.

Estimated time when tires are needed

You need to be careful not only for wear, but also for large cracks, scratches, and deformation.If you are in a frequent car when you need to replace the tires, you should regularly check the points mentioned so far and replace them according to the condition of the tire.

On the other hand, for general riding, the following timing will be one of the replacement times.

Tires are rubber products, so they gradually lose their flexibility as time goes on.The handling and brakes will affect you, so even if the depth of the groove still remains, replace it after 3-5 years.In addition, it is recommended that the depth of the tire groove should be replaced at a timing of about 3 mm, without waiting for a slip sign.

Tire replacement can be done by yourself if you have knowledge and equipment, but considering the trouble, it is safer to have a dealer, car supply store, gas station, etc.

With car leasing, it is safe for both inspection and tire maintenance

In order to pass the vehicle inspection, regular inspection and maintenance of tires, such as slip signs, are important.However, maintenance of various parts, such as tires, engine rooms, operating systems, lights, and bumper, requires car maintenance.Many people think that it takes time and cost and is difficult.

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Using a maintenance plan can include the cost of maintenance in the monthly fee, so you can perform car maintenance without worrying about large expenses during vehicle inspection or repair.Of course, you will be able to take care of your daily tires.

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Check the condition of the tire wear and replace it at the right time

Tires that are indispensable for safe driving are also important inspection items for vehicle inspection.One of them is a slip sign that indicates the passing standard for the tire groove.If the wear of the tires becomes intense, it is a major problem with safety, so be sure to reduce the wear as much as possible by adjusting the air pressure and replace the worn tires at the right time.

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Frequently Asked Questions

Q1: What is a slip sign?

A: The depth of the tire groove is one of the inspection items for the vehicle inspection, but the slip sign shows the passing criteria.New tires have a groove of about 8mm in depth, but as a result of driving, depth 1.When it reaches 6mm, a slip sign will appear on the surface.Tires with slip signs do not pass the vehicle inspection, so you need to replace them.

Q2: Why do you inspect the slip sign in the vehicle inspection?

A: Tires whose grooves become shallow as the slip signs appear on the surface, have a significant effect on safety due to reduced brake performance and handling performance.Another reason is that the risk of being hit by the "hydroplaning phenomenon", which makes it impossible to control the handle and brake in rainy weather.

Q3: Is there a way to get into a car without having to worry about slip sign?

A: Cur leasing that can cover the cost of maintenance and vehicle inspection at a monthly fee is recommended.The flat -rate Calmo -kun can cover the cost of replacing consumables, such as engine oil, and the cost of recovery at the time of expiration of the contract, and depending on the plan, the same failure after the manufacturer warranty expires.It is also possible to give a warranty.

* Information in this article is produced with information as of November 2021.