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Car Basics (12) Do You Know Your Tires?

In the comments of the previous column

There are many cardholders who say in the comments that I am more sao-like

Here I want to clarify

I'm not like that myself

The article was all forced by the editor-in-chief

In everyday life

I'm actually more than you think

More agitation

Okay kidding, let's get to the point

In a car, one of the most frequently replaced parts

I'm afraid it's tires

It just so happens that our "Automotive Basics" talks about the driving system

Then we must also talk about tires, which burn money

I don't know if you've heard of it

"Radial tires"

and

"Bias tires"

These two concepts?

Everybody knows that

In the rubber skin of the tire

In fact, there are many layers of "filler"

In the early years

Due to the limitations of the level of production

The arrangement of the filling inside is like this

他们斜着交叉在一起

You press me, I press her

Stacked arhats are arranged together

Life and life are not separated

Therefore, this kind of tire is called "bias tire"

afterward

The level of science and technology is changing with each passing day

One day an engineer made a surprising discovery

After using the new technology

Technology doesn't stack Arhats like that

It can also make these lines "life and life not separate"

That being the case

In order to be able to make the most of the strength of the lines

Then let them line up like this

Since the direction of their alignment and the radial section of the tire are consistent

That's why this kind of tire is called

"Radial tires"

(PS: radial tires were invented by Michelin)

(PPS: Fat people who don't want to invent radial tires are not good cooks)

In simple terms

The difference between radial tires and bias tires is

The "ply layers" inside are arranged in different directions

Because of this difference

Radial tires have

Good heat dissipation, low weight, low resistance,

Wear-resistant, puncture-resistant, comfortable, and stable at high speeds

and so on

Whereas, bias tires have:

The sidewall is thick and has high lateral strength

and

cheap

These two advantages

The radial tires have become rich and handsome

It has gradually become the leader of the tire industry

Now take a look at your tire models

As long as it has the letter "R".

All are radial tires

After becoming "rich and handsome".

Radial tires began to live a life of "wearing gold and silver".

Gradually, I got it

"All-wire radial tires"

"Semi-wire radial tires"

This is an upgraded and enhanced version of the product

And bias tires

Due to the "lack of progress"

Until now, basically only "nylon" materials have been used to play with him

Therefore, bias tires are generally "nylon tires"

And the "wire tires" we usually talk about must be radial tires

In addition, there are tubeless tubeless products currently on the market

It's basically "radial tires"

(Anyway, I haven't seen a bias tire with a vacuum)

It can be said that you can't keep up with one step, and you can't keep up with each step

Bias tires are now mostly only seen on low-speed cars

Radial tires have long dominated the market for high-speed vehicles

In order to prevent everyone from getting confused

Let me summarize here

Bias tires are relative to the concept of radial tires, the difference is that the structure is different

Wire tires are a concept relative to nylon tires, and the difference is that the materials are different

Tubeless is a relative concept of "tires with tubes", the difference is that there are tubeless tires

On the market today

Vacuum tires are generally steel wire tires, and steel wire tires are radial tires

Whereas, bias tires are all nylon tires and generally have inner tubes

That's all there is to say about these two classifications of tires

Let's talk about the model of the tire

Let's illustrate three specific situations:

1）

295/80R22.5

This type of numbering scheme is more common today

Especially on the car, it's like this

The letter R - as mentioned earlier, stands for radial tires

295 – This tire width is 295mm

22.5 – The diameter of the rim is 22.5 inches

80 - flat ratio, indicating the thickness ÷width of the tire=0.8

Plainly

If the other models remain the same

80 is changed to 85, and the tires become thicker

2）

12R22.5

这种叫英制规格

R still stands for radial tire

12 - The width of this tire is 12 inches, which translates to 304.8mm

22.5 – The rim diameter is 22.5 inches

So so

This flat rate defaults to 90

Because of the focus on practicality

So it's low-key

Just acquiesced

I can't see it

Other than that

Behind this set of numbers

If two digits appear

That's the level of tires

3）

8.25-20

This numbering scheme is very similar to the previous one, except that an R is missing

Illustrated, it is a bias tire

so

8.25 – The tire width is 8.25 inches

20 – The rim diameter is 20 inches

Okay, let's stop here for the content of tires

If you're still feeling a little confused

Then watch it twice

Save yourself the confusion when buying tires

There are two more verbose words here

Don't be confused when buying tires

Don't get confused when driving

Tire temperature and tire pressure must be paid attention to at all times

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Automobile basic knowledge (13) how to identify retreaded tires?