Why does the car deviate when the tire is replaced?

In order to better use the tires, the position of the tires should be reversed every 20,000 kilometers, because the wear of the driving wheels will always be greater than other wheels, and different friction will directly cause deviation. Another common cause may be inaccurate wheel alignment, such as the camber angle of the front wheel, the incorrect kingpin angle, or the toe-in angle being too small.

The way to avoid it is to usually go on the road less often, reduce the speed when passing a big pothole, as long as it is normal driving, generally one or two years do not need to do four-wheel alignment. But if there is a situation, you must go to a professional car repair station for testing, although some small testing points are cheap, but the adjustment is not accurate, and it will not take long to be **. Under normal circumstances, the probability of deviation caused by the failure of the suspension system of the new car is very low, because the vehicles before leaving the factory have been strictly tested and adjusted by the manufacturer.

However, it is not excluded that there are problems with the original design, such as the motion interference of the guide rod of the suspension and the steering tie rod will affect the deviation of the vehicle. The former is caused by errors in manufacturing and adjustment, the latter is caused by the original design, and the latter mostly causes deviation to the right.

Check the dynamic balance of the spare tire.

Check that the tire pressure on both front wheels is the same.

Check whether the wear degree of the surface of the spare tire is smooth and new, and whether there is a tire gnawing and obvious high and low phenomenon.

For safety reasons, all tires on the car must be dynamically balanced, and spare tires must be used well, because it is possible to change to any wheel position at any time.

Four-wheel alignment is based on the vehicle's four-wheel parameters, which are adjusted to ensure good driving performance and certain reliability. The installation between the steering wheel, the steering knuckle and the front axle of the car has a certain relative position, and the installation with a certain relative position is called steering wheel alignment, also known as front wheel alignment. The front wheel alignment includes four contents: kingpin camber (angle), kingpin camber (angle), front wheel camber (angle) and front wheel toe.

This is the relative position of the two steering front wheels and the rear axle for the two rear wheels, which is called rear wheel alignment. Rear wheel alignment includes wheel camber (angle) and rear-wheel toe-in by rear. In this way, the front wheel alignment and the rear wheel alignment are collectively called four-wheel alignment.

There are many reasons for mistrackingInsufficient air pressure in the tires can cause misalignment, the degree of tread pattern wear is not the same, there is a problem with the design of the suspension system, or the suspension is injured.

Due to the different working conditions and loads of each tire, the rear wheel load of the truck is generally greater than the front wheel, and the front wheel load of the car is generally greater than the rear wheel, if the driving position is on the left side.

Normally, the speed of the car when turning left will be greater than the speed when turning to the right, resulting in the tire on the right side of the car being stressed more than the left tire when turning left, and the right edge of the right tire is most worn after the car has traveled a certain mile. On the contrary, in right-hand driving areas such as Hong Kong, the United Kingdom, and Australia, the outside edge of the left tire is more worn.

Tire rotation should adopt different rotation methods according to the different characteristics of tires:

1) Transposition of tread non-directional bias tires. Since the front wheel is worn heavier than the rear wheel when the tire is in use, the tire on the same axle can be swapped to make the left and right sides of the tire wear evenly. After a period of use, the replaced tires on the front axle can be scrapped, retreaded or used as spare tires, while new tires are installed on the front wheels.

It is more economical to do so.

2) Transposition of radial tires. Radial tires should be kept on the same side of the vehicle, i.e. in the same direction of rotation. The rotation direction of the radial tires is fixed, and if the direction of rotation is reversed, the vehicle will lose its handling stability, make the car unsmooth and vibrate.

The above content reference: Encyclopedia - Tire Rotation.

What should I do if I keep mistracking when driving after changing new tires? Do you want to do wheel alignment?

There are many reasons why the steering wheel of the car cannot automatically return to the right, including damage to the car steering machine, wrong toe value, damage to the pendulum, etc., which are analyzed below.

1. Damage to the steering gear of the car:

When the steering mechanism of the car is damaged, the car will have symptoms such as difficulty in steering or the direction cannot automatically return to normal. In this case, the gap of the steering machine should be readjusted, and lubricated with lubricating oil, if the car steering wheel still cannot be corrected, it should be checked by a professional in a repair shop or 4S shop.

2. The toe-in value is incorrect

If the car does not do four-wheel alignment after replacing the tires, the toe-in value of the car tires is wrong, the tires on both sides will not reach the parallel state, and the car will not automatically return to the right due to resistance when steering. In this case, the vehicle should be re-aligned and the toe value adjusted.

3. Damage to the pendulum

If the pendulum of the car is damaged, it will aggravate the wear and tear on the inside of the vehicle's tires and affect the automatic centering function of the steering wheel. In this case, replace it with a new pendulum glue.

Things to note about car steering machines:

1. When the car is parked, the steering wheel should be corrected, otherwise it will cause resistance to the steering machine, which will affect the life of the steering machine for a long time.

2. After the car replaces the tires, do the four-wheel alignment in time and check the steering machine.

3. Lubricate the parts of the steering machine on time.

What's going on with the steering wheel not right.

1. The steering wheel is not correct after the vehicle is used for a period of time, which has a certain relationship with the tire pressure, tire wear, wear and tear of various parts of the chassis, and four-wheel alignment. If the tread pattern of the two front tires is not worn consistently, it will also cause the vehicle to deviate.

2. If there is no problem with the tire, it is recommended to go to the 4S shop to check the use of various parts of the chassis, the value of the four-wheel alignment will also lead to the problem of improper steering wheel after using it for a period of time, and it is also possible that the cross tie rod is offset to one side and causes the steering wheel to be wrong.

The steering wheel of the car needs to be adjusted in time, otherwise the potential safety hazards are great when driving, and it is very easy to have some collisions.

The difference between a misaligned steering wheel and a mistracking:

Deviation does not necessarily mean that the steering wheel is not right, and the steering wheel is not necessarily wrong, and the two can also coexist, both deviation and steering wheel error. I have encountered someone who said that the steering wheel is not correct as deviation, because after he hit the steering wheel horizontally, the car will run to the side, and he thinks that it is misaligned, but in fact, it is just that the steering wheel is not right.

Therefore, if you want to know whether your car is off, then find a relatively straight and flat road with few vehicles to try, it must be a flat road, potholes are not allowed, because the wheels will change direction when they press over potholes and bulges, and some roads will also have errors in the middle high and low in order to drain water.

1.Tire loss.

The imbalance of tire pressure on both sides of the vehicle will directly lead to the deviation of the vehicle! The principle is very simple, the tire pressure on both sides is unbalanced, on a flat road, the left and right are high and low, and the vehicle will naturally deviate to the side of the gas loss.

Solution: It is recommended to check whether the tire pressure on both sides is normal, if there is a loss of air, then carry out air filling, if there is still deviation, then continue to look down.

2.Wheel alignment.

For vehicles that have been driven for a period of time, changes in wheel alignment data can also lead to mistracking. Especially for vehicles that often walk on potholes and on and off the road, the parameters of four-wheel alignment are more likely to change.

Solution: Find a time to go to the 4S store to do a four-wheel alignment, the probability of deviation caused by this reason is quite large.

3.The wheelbase on the left and right sides is inconsistent.

Wheelbase is the distance between the two perpendiculars that pass through the center of two adjacent wheels on the same side of the vehicle and are perpendicular to the longitudinal plane of symmetry of the vehicle. To put it simply, it is the distance from the center of the front axle to the center of the rear axle of the car. As shown in Fig-2, a is the wheelbase of the car.

If the body is deformed greatly, and it is not corrected in time, or it does not meet the technical requirements after correction, it will lead to the inconsistency of the left and right wheelbases, and the load-bearing body of the car is more prominent. When a car is moving, it is deflected towards the side with a shorter wheelbase.

Solution: First of all, check the wheelbase on both sides with a four-wheel aligner, if the wheelbase difference does not meet the technical requirements, the body corrector can be used to restore the deformation. When making a preliminary judgment, you can also use a meter ruler to measure at the center of the wheel.

4.Chassis problems.

Mistracking can also be caused by changes in the main components of the chassis, which can be due to wear and tear caused by daily driving, or due to frame deformation caused by accidents. If there is a change in components such as the lower swing arm or the gap is too large, adjusting or replacing the parts can be solved; If it is caused by the deformation of the car body and the damage to the frame caused by the accident, it is more serious, and it is necessary to replace parts in a large area or even to correct the frame before it can be fully recovered.

The new car has changed the tire a little to the left deviation, considering that it is a new tire, the main reason for the deviation is the lack of tire pressure and the balance and positioning of the tire is not done, may sometimes go to the side of the road or quickly pass through the pit caused by the change of the front wheel data resulting in the tire eating, replace the tire and then do a 4-wheel alignment.

There are mainly the following reasons for the deviation of the car's direction:

Insufficient air pressure in the tires will cause them to deviate;

The degree of wear of the tread pattern is not the same, and it will deviate;

If there is a problem with the design of the suspension system, it will deviate;

Suspension injuries, deformations, displacements, and ......deviation will occur, 5

The quality of the steering system will also affect the straight line of the car.

Caused by brakes, the difference in the size of the gap between the left and right brakes and the shoe pads will also cause brake deviation.

The normal road surface is sloping, high in the middle and low on both sides, so in China, the car will generally deviate to the right on the road.

First, check the tire pressure, if it is normal, and then check whether the front wheel toe is normal.

Go to the 4S shop to do four-wheel alignment, or tire pressure detection, which specifies that there is a skimm, and the tire pressure is unstable.

The dynamic balance of the new tires must have been done, and if it is still off, do the four-wheel alignment!

What should I do if I keep mistracking when driving after changing new tires? Do you want to do wheel alignment?

If only one of the front wheels is replaced, it is normal for deviation to occur. Because the old tires have been worn, the diameters of the two tires are not the same, and the distance traveled by the left and right wheels in one turn is different, and there will definitely be deviation. If two tires or four tires are replaced at the same time, the deviation is mostly caused by different tire pressures, or it may be caused by the difference in the tires themselves, or it may be caused by slightly inaccurate positioning data.

Wheel alignment: This measure is also the most common way to correct deviations. Compared with the tire pressure test, the cost of four-wheel alignment is higher, and the owner can first see the effect by balancing the tire pressure.

Check the suspension: If the wheel alignment is not working, you should consider whether there is a suspension problem with the vehicle. Generally speaking, if there is a problem with the design of a car's suspension, it is easy to deviate. In addition, in the process of use, suspension injury, deformation, displacement, etc. are prone to deviation.

Check the steering: The steering system may be worn for a long time, so that the clearance of the connecting parts is too large, or the bearings and other components are loose, resulting in the car can not drive according to the normal trajectory, resulting in deviation.

The two sides of the spring are replaced together, and it is particularly necessary to remind here that if it is because of the deviation caused by suspension, the owner must replace the left and right sides together when replacing the spring, rather than only replacing the spring with unilateral problems, so as to ensure that there is no new deviation. (Photo by Zou Ting1) @2019

During driving, some car owners will find that the vehicle has a deviation. For this problem, many car owners will position the wheels, but the deviation situation has not improved. Why?

1.Four-wheel alignment deviation.

After a period of driving, the four-wheel alignment value will change, especially for vehicles that are often used in bad road conditions and vehicles that often get on and off the edge, which is also one of the reasons for vehicle deviation.

2.Different tires on both sides.

For a car, all four tires should be of the same model as possible, and at least the two tires of the front and rear axles must be identical. In addition, the style and depth of the tire pattern on both sides must be the same, so as not to have different patterns.

Tips: For the problem of tire mistracking, it can be avoided by changing the tire position every 20,000 kilometers. Because the wear of the drive wheels is always greater than that of other wheels, the different friction forces will directly lead to mistracking.

Be careful when changing positions. The front and rear wheels need to be replaced in pairs. If you want to replace new tires, replace all four tires at the same time, and try to replace tires with the same brand and pattern.

3.The tire pressure on both sides is different.

The air pressure of the tires on both sides of the car is different. If the pressure on the left tire is a little less and the pressure on the right tire is a little more, then the car will immediately go off.

Also, many car washes also have tire pressure monitors that you can check while you wash your car. What can be solved for a few dollars, you don't need to spend hundreds of dollars to do four-wheel alignment directly.

4.The front shock spring is deformed.

The front shock absorber springs are deformed on both sides, resulting in inconsistent cushioning and vehicle mistracking.

5.Front shock absorber failure.

After the failure of the front shock absorber, when the vehicle is driving, the two suspensions, one high and one low, are stressed unevenly, resulting in deviation.

6.Excessive on-site wear.

Excessive wear and tear on vehicle chassis components leads to abnormal clearances. Steering tie rod ball joint, rubber sleeve for support arm, rubber sleeve for stabilizer bar, etc. Whether the part has excessive clearance.

7.Bad aftertaste of wheel brakes.

One of the wheels had a bad brake return and incomplete separation. This is equivalent to a wheel that has been partially braking, and the vehicle will inevitably deviate when driving.

8.The overall deformation of the frame.

If the frame is deformed as a whole, the wheelbase difference between the two sides is too large, exceeding the maximum allowable range, which will also cause the vehicle to deviate.