What Is the English Wheel?

The types of tires are: the international standard tire code, which represents the percentage of cross-section width and flatness ratio in millimeters. Add after: tire type code, rim diameter (inch), load index (allowable load quality code), allowable speed code. For example: 175 in 175 / 70R 14 77H means that the tire width is 175MM, 70 means that the flatness ratio of the tire section is 70%, that is, the height of the section is 70% of the width, the rim diameter is 14 inches, the load index is 77, and the speed is H-class .

The displacement of a small car is between 0.8-1.5. Its front tire size is applicable to the range of 155 / 65R13 73T--175 / 70 R 14 77H. The displacement of large cars is between 1.6 and 6.0, and the tire specifications are correspondingly in the range of 185/60 R 14--245 / 50 R 18.

General tire specifications can be described as:

[Tire width mm] / [percentage of tire thickness and tire width] R [rim diameter (inch)] [load factor] [speed mark]

or

[Tire width mm] / [percentage of tire thickness and width] [speed mark] R [rim diameter (inch)] [load factor]

For example: 195/65 R15 88H or 195 / 65H R15 88

Can be interpreted as:

Tire width ----------------------- 195mm

Flatness ratio of tire section ------- 65% i.e. tire thickness = 126.75, 126.75 / 195 * 100% = 65%

Wheel diameter ------------------- 15 inches

Load factor ------------------- 88

Speed factor ------------------- H

Generally speaking, [Tire Width] / [Tire Thickness and Percent Width] R [Rim Diameter (inches)] Knowing is helpful for changing the tires that are suitable for your car. Knowing the [Load Factor] and [Speed Mark] of the tires is helpful for driving safety. ^[1]

Misunderstanding 1: high prices indicate good quality

Businesses may tell buyers that the high price of imported tires is due to excessive tariffs. According to China's relevant regulations: the tariff on an imported tire is 30%, plus 17% value-added tax and 10% consumption tax. If you add the profit you want, the retail price can be imagined. In fact, no one pays attention. However, there is another reason for the high prices of imported tires: foreign suppliers overestimate costs in order to make money. Tires are a kind of consumables, especially those equipped with common foreign models. They are never exceptionally good value for money.

Misunderstanding 2: The best imported

Some people who buy tires especially like to emphasize the original import. As everyone knows, the average car starts to change tires after two or three years of use. At this time, the so-called original tires are actually out of date in terms of style and performance. A car of the same style is likely to be equipped with tires from different manufacturers. What about imported? Only the price of tires will be a lot higher because of the imported word.

Misunderstanding 3: Just popular abroad

One of the most fatal flaws of the new tires introduced abroad for domestic users is that they are not applicable. The flat road surface in Europe is quite different from the road conditions of Beijing's second and third ring roads. Tires suitable for European road conditions can hardly perform well in Beijing, especially the impact resistance of the tire side is obviously somewhat unsatisfactory, just like It s inevitable to wear Italian brand-name leather shoes on the stone road. After the production of some foreign-branded tires in domestic joint ventures, a layer of cord fabric was added to the side of the tire according to domestic road conditions, which greatly enhanced the impact resistance of the tire side. The tires produced by the joint venture can completely replace imported products in terms of performance .

Misunderstanding 4: The original specifications are not changed.

The incomplete specifications of imported tires are largely due to market speculation by foreign suppliers. Considering only making money without considering the actual needs of customers, this is the code of conduct for some foreign suppliers, and many consumers Because there is no professional knowledge, and I do not know the trick of tire specification interchange, I have to look forward to the arrival of the original import. For example, there are many car owners in Beijing who own the Fiat company's Uno sedan. The tire specifications are 155 / 70R13. Most of the patterns are Pirelli P2000. In fact, the P2000 pattern has already been eliminated and the price is still expensive. This kind of tire even costs six or seven hundred yuan. It is better to be flexible in this case. You can also use the money to buy two domestic tires. This will have several advantages. Two new tires are used coaxially. One new and one old is more secure; joint venture tires or domestic tires adapt to domestic road conditions, and there are local claims for quality problems; do more with less, most tire stores can buy it, think about it, why not?

I ve been shopping for a long time, and my feet will feel sore, and I want to rest, not to mention the car. The journey of a thousand miles begins with one step. The lover and the car are the same road. The experts of car maintenance online will teach you how to make a car for you. Comfortable foot treatment! ^[2]

Tire specification check

During driving, the tires used as "car feet" are like people walking through each place with different feet and experiencing different places and encountering different situations. Therefore, at this time, the owner should focus on checking the condition of the tire. Sundries or foreign objects are trapped in it. If found, they should be cleaned up in time. If they are not cleaned up in time, some of them will "erode" the tires slowly, except that some of them will fall off automatically while the car is running. At a certain level, they will puncture the tire, causing the tire to rupture, flat, leak, etc., and easily cause their own danger.

Replace tire specifications in a timely manner

First, the overall cleaning of the car, especially the tires. If the tires are covered with mud, it is easy to cover the tread scars. The cleaning is to check the tires for sand, cuts, and bulges. In other situations, if the tire is found to be cracked, it should be replaced immediately. Second: If serious tire wear is found, the braking force of the car will be reduced. To prevent such a situation, it is best to replace it in time. Third: If the tire valve is found to be a rubber product during the inspection, when the rubber turns dark red, it means that the valve valve is aging, and good air tightness cannot be guaranteed. It is best to replace.

Tire specification check balance

During long-distance self-driving, your car must have experienced collisions, high speeds, sharp turns, emergency braking, or crossing obstacles. The tires will also lose balance due to such problems. As a result, the vehicle runs sideways, bumps, or uneven wear of the wheels (commonly known as "flat tire"), which affects driving safety.

Check tire pressure

Detecting tire pressure is the most important part of the daily maintenance of the tire, and it should not be done only when the hike returns. In daily driving, you should develop a good habit of checking tire pressure regularly (preferably once a week) to eliminate hidden dangers in the bud state. Check the tire pressure in a cold tire state. This is because the tire pressure will be higher than the actual value after the tire is heated up due to driving. At this time, if the tire pressure of a hot tire is reduced, the tire pressure after cooling is insufficient.