Will the speed and kilometers per hour change when the tire size of the car is changed to 20

The outer diameter of the tire has changed, and the speed kilometers per hour must have changed, and the specific value needs to see the actual modification and use, and cannot be summarized uniformly.

There are various factors to consider when modifying tires:

1. Local traffic regulations (will not affect the annual inspection of vehicles, vehicle warranty, etc.);

2. Tire speed and load index;

3. Specifications of the rim, such as width and offset, etc.;

4. Space; 5. the suspension system of the car;

6. The (important) load radius of the tire remains the same.

It doesn't change, the speed and mileage work by the speed of the propeller shaft.

But the real speed and mileage are much bigger than on the table.

Yes, your speedometer won't be accurate. Because the tire circumference has changed.

That's for sure. Because the on-board computer calculates the mileage by relying on the speed sensor, it can only measure the number of revolutions the tires have turned.

Constant, speed is only about mass, and I've calculated it in a physical way.

The error does not exceed.

If the tires of the car are changed to a larger or smaller size, the kilometers will definitely not be accurate. If you change to large tires, the actual mileage is less than the displayed mileage; If you change to small tires, the actual mileage is more than the displayed mileage. Because the odometer is designed according to the speed of the wheel, it is changed to a large tire, and the mileage of one revolution becomes more, but the indicator remains the same; Vice versa.

Introduction:

Automobile tires are one of the important parts of the car, which is in direct contact with the road surface, and the car suspension works together to alleviate the impact of the car when driving, and ensure that the car has good ride comfort and driving smoothness; Ensure that the wheels and the road surface have good adhesion; Improve the traction, braking and passability of the car; Bearing the weight of the car, the important role played by tires in the car is becoming more and more important.

A change in diameter will definitely cause an inaccuracy in the odometer, and if the diameter of the aspect ratio changes the same, it will not affect the odometer. The principle is very simple, the odometer is calculated according to the number of laps of the tire, the tire is larger and the circumference is smaller, and the tire is smaller. Therefore, changing small tires will be more than the actual kilometers, and large tires will be more than the actual kilometers.

The mileage of the car is calculated based on the circumference of the rim, which means that the number of revolutions multiplied by the circumference is equal to the mileage traveled.

If the tire diameter is small, it will definitely change the rim and affect the mileage count. If it's just a wide-side or narrow-side tyre, it doesn't matter.

Well, according to its counting principle, it can be known that if you change to a large rim, the counting table will be smaller than it actually is, and vice versa, it will be larger.

If you change it to a larger size, there will be more odometers, and if you change it to a smaller size, there will be fewer odometers.

The odometer is calculated using a sensor that is integrated into the inner and outer rings of the hub bearing unit, which is equivalent to a small generator.

When the inner and outer rings of the hub bearing rotate relative to each other, the sensor generates electricity to the odometer and calculates the number of revolutions.

It's not accurate, although the induction plug is in the front gearbox, but it's actually incorrect, but it's nothing, you can use big tires to estimate the approximate speed, such as running more than 80 plus 10% on the line, don't need to go into too much detail.

Will it change? I don't know, the vehicle's odometer is used to sense the speed of the flywheel with a sensor and then displayed on the odometer, what does it have to do with the tires, of course, the actual mileage of the big tires must be more than the one shown on the table, small tires sorry will someone use them on the original basis?

After changing to smaller, the mileage will show more, and the actual will be less.

If you know it, you can use the computer to adjust the circumference of the car rim to display it accurately, if it is mechanical, there is no way.

The outer diameter of the tires on a car is not easy to change, and generally changing the tires will only change the flat ratio, because the large wheels are changed.

In addition to the outer diameter of the tire, the tire is generally widened but not narrowed, which will affect the grip and thus the braking distance.

First of all, it is recommended that the specifications of the tires purchased should be consistent with the specifications of the tires assembled in the original car, if you need to change the tire specifications, you must go to a professional tuning shop for tire upgrades, or consult the car manufacturer.

There are various factors to consider when modifying tires:

1.Local traffic regulations (will not affect the annual inspection of the vehicle, vehicle warranty, etc.);

2.speed and load index of the tire;

3.Rim specifications, such as width and offset, etc.;

4.Space; 5.the suspension system of the car;

6.The (important) load radius of the tyre remains the same;

Therefore, it is recommended that matters such as tire specification conversion and installation must be carried out by professionals. If necessary, consult the automobile manufacturer on relevant laws and regulations.

I'm a car repair drip but not a tome (* hee hee......

The reason is very simple, the installation position of the speed sensor is fixed, they are installed in the rim that is, the inside of the flange, composed of a ring gear and a probe, even if the tire is not installed, its speed is constant, and it has been set at the time of leaving the factory No one can change it, the actual mileage is a little more than the displayed mileage, if you are the original car tire display kilometers are right, if you change to a large tire will be more, for example: a small tire is 1 meter but a large tire is a meter, Modified flat tires and also this principle.

I won't talk about the harm of tires getting bigger and smaller.

Here is a formula for calculating the total diameter:

The total diameter of the tire The diameter of the wheel hub (inches) * tire width * flat ratio * 2, such as the tire specification is.

The total diameter of the tires of 185 60R14 is 14 cm, the total diameter of the tires of 205 50R15 is 15 cm, the total diameter of the tires of 195 50R16 is 16 cm, if you are the original tire of 185 60R14, then if you change to the tire of 195 50R16, the diameter increases by centimeters, increases about, so the speed will also become faster, when you see that the speedometer is 80km h, the actual speed is, when the mileage is 100km, the actual walking.

If you change it to a smaller one, then the reverse is fine

Everyone has talked about the situation in detail after the change, but I would like to mention another issue, which is the harm to the vehicle.

1. The fuel consumption of automobiles increases.

2. Braking impact (mainly leading to an increase in the probability of deviation).

3. The working state of chassis-related parts changes, and the service life is shortened.

Each vehicle from design, research and development, trial production, road test, small batch production, mass production to sales are produced after a comprehensive consideration of many aspects, so the problems caused by changing the tire configuration at will are unforeseeable (because of the different factors, the problems caused are not the same).

Of course not.

Nowadays, some taxis are trying to make more money.

Change to small tires. The mileage is designed by the manufacturer.

The sensors are mounted at the rear of the gearbox.

The most important thing is not to change the diameter of the original tire, you can increase the hub and reduce the aspect ratio.

As long as the large diameter rims are not replaced, the diameter of the tires will not change basically.

As long as the wheel pot should not be the tires, it will not change.

Changing the width of the tires will not affect the speed of the vehicleIt is the tire diameter that affects the speed of the car, no matter how you upgrade, the best tire diameter does not change, as long as the tire diameter error is within 3%. 165 70 17 If you upgrade to 205 55 16 tires, we can calculate it through the tire computer.

After calculation, it is known that the tire diameter of 205 55 16 is larger than that of 165 70 14, which is far more than the upper limit of 3%, and cannot be directly upgraded.

Tires are ring-shaped elastic rubber products that are grounded and rolled on various vehicles or machinery. It is usually installed on a metal rim, which can support the body, cushion external impacts, achieve contact with the road surface and ensure the driving performance of the vehicle. Tires are often used in complex and demanding conditions, and they are subjected to various deformations, loads, forces, and high and low temperatures when driving.

The 195 60 tires are replaced by 205 60 tires, and the flattening rate has changed, that is, the tire diameter has become larger, so the actual driving speed will be higher than the speedometer, and this gap is about two percent higher than the speedometer in the actual speed. The speeding fine generally starts at 10 percent, which means that you can't drive more than 8 percent of the show, and if it's not easy to control, you can definitely drive according to the show.

After changing to 205, the humidity gauge is about 2km slower than the original, that is, when the speed is 100 per hour, it is actually 102.

It is best not to change the specifications of tires at will, the tires configured by the original factory are determined after all aspects of consideration, and the owner should not be modified randomly.

There are various factors to consider when modifying tires:

1.Local traffic regulations (will not affect the annual inspection of the vehicle, vehicle warranty, etc.);

2.speed and load index of the tire;

3.Rim specifications, such as width and offset, etc.;

4.Space; 5.the suspension system of the car;

6.The (important) load radius of the tyre remains the same;

As the diameter of the tire increases, the speed of the tachometer must decrease, which is equivalent to the distance of a turn when the diameter is larger, so that the speed limit is displayed on the speedometer and becomes slower. According to the formula circumference l=, each revolution will cover an additional distance of 20*.

Car tires are generally changed every 3-5 years. Usually the life of the tire is 3 5 years, more than 3 years of tires need to focus on checking whether there is a rubber crack, if there is no can continue to use, but to observe the wear of the tire pattern.

If the tire is found to have microcracks during the inspection, it is recommended that the safest way is to replace the new tire to prevent the aging tire from bursting and affecting driving safety.

Precautions for replacement

The replacement time of tires is generally not dead qualitative. This is based on the different driving conditions and driving habits of the vehicle, and the degree of wear and service life are different. Generally, if there is no bulge, cracks, and hard injuries, you can judge whether you need to replace new tires according to the depth of the pattern, and generally wear to the point where there are still two or three millimeters left, it is recommended that the owners replace the new tires, so as not to leave potential safety hazards.

As long as the tires are not scratched and there are no other major problems, they can be used forever. In this regard, some auto maintenance professionals said that the replacement time of car tires should be based on factors such as the road conditions and driving habits of the vehicle.

The above content reference: People's Daily Online - When is it appropriate to replace car tires?

In fact, how often car tires are replaced can be judged according to the wear marks of tires, and the general replacement cycle is roughly within 3-5 years or 4-60,000 kilometers. Of course, due to the influence of driving habits and road conditions, there may be discrepancies, and it is not recommended to judge whether it needs to be replaced based on mileage or time alone.

Generally speaking, the tires are about 6-80,000 kilometers, and it is necessary to consider whether they need to be replaced according to the actual situation.

Generally speaking, about 60,000 kilometers, the tire will have small cracks, aging and other problems, so try not to exceed 60,000 kilometers, but it can also be replaced earlier according to the actual situation when the lines are smoothed.

About 100,000 km. How often to change tires for family cars is not a set time. According to the driving habits and driving conditions, the service life of the tires is not the same, if it is normal driving, because the rubber products will age after a period of time, this time period is about 5 years.

Most drivers will say that they need to change their tires after running for many kilometers, but in fact, they are not, and the tires do not have many kilometers to speak of, because the road conditions are different, and the wear and tear of the tires is not the same. After the old driver learned, you can see when the tire should be replaced by looking at the tire pattern wear. Each tire has an indication mark of tire wear, and the direction indicated by the sidewall triangle mark can be pointed to the small square indicating the wear limit in the tread According to the current regulations of our country, when the tire surface pattern is worn to less than millimeters, it is time to replace.

However, some foreign tire experts suggest that it is safer to double this standard, that is, the tread should be left more than 3 mm deep.

There is no fixed time for the frequency of changing the front and rear tires of a car. However, if it is normal driving, the tires can be changed by time and kilometers. It is recommended to switch between 10,000 and 20,000 km.

When the front and rear tires are exchanged, it should be noted that tires with symmetrical patterns can be interchanged, and tires with asymmetrical patterns and single-guide patterns must be interchangeable front and rear. If it is only the front and rear tires reversed, it is not expensive, about 30-50 yuan. If you want to do balancing at the same time.

The cost will increase accordingly, about 100-200 yuan for general maintenance shops, and about 300-500 yuan for 4S shops. Under normal circumstances, in order to ensure the quality of maintenance, 4S shops generally require dynamic balancing to prevent the rear steering wheel from transposing.

High-speed shaking. <>

Most of today's family cars are front-wheel drive, that is, the front wheels have to be rotated to drive. In this case, the wear of the front wheels is greater than that of the rear wheels; In addition, tire wear is also related to the load. Generally speaking, the load on four tires cannot be exactly the same, which makes the wear of the tires different.

Tires with heavy loads naturally wear out more. Therefore, in order to ensure the normal wear and tear of tires, it is necessary to carry out regular front and rear wheel alignment to prolong the overall service life of tires and ensure driving safety. And it should be noted that the front and rear wheels should be reversed according to certain principles.

For example, single-guide tires and tires with asymmetrical treads must be reversed front and reverse. The first thing to be clear about is that car tires are durable, and tires are designed to increase friction.

And the design has a deep texture. However, the long-term driving of the car generally leads to uneven force, and the wear of various tires is also different. Accumulating a certain difference will bring great safety risks to the car.

For example, when turning at high speeds, there will be skidding, unstable and even rollover. Therefore, it is necessary to change the tire regularly.

The old driver said that under normal circumstances, the car travels 8,000 to 10,000 kilometers and needs to be transposed and four-wheel drive. The difference in wear and tear of the four-wheel drive is mainly reflected in the front and rear wheels, and we only need to switch the front and rear wheels. Precursor or rear-wheel-drive.

The wear and tear of these two cars will be a little more complicated. Generally speaking, the left front wheel and the right rear wheel will be switched, and the right front wheel and left rear wheel will also be switched. Snow tires, snow tires due to their special texture design and material, generally do not need to be transposed, can be used normally.

In addition to the need for a tire change.

The old driver also said that when the tires are used for 3 to 5 years or the cumulative mileage reaches 100,000 kilometers, they need to be replaced with new tires.

In addition to this standard, the tires can also be directly observed. If the tire is cracked or inflated, or if the tire tread is worn down to just millimeters, a new tire will need to be replaced. Because, after the tire reaches a certain degree of aging, the friction and grip will be greatly reduced, and the braking distance.

will increase dramatically. In severe cases, it will slip and slip, which is a great safety hazard. It is recommended that you pay attention to the maintenance of tires in your daily vehicles, because tires are directly related to the safety of the car.

And we must keep these points in mind, change the tire every 10,000 kilometers, change the new tire every 100,000 kilometers, and replace the tire in time once cracks and bulges appear. Once you're close to these measurement standards, get a professional to evaluate the use of your tires and make a final decision.