I don't know what score you want, Hafei.
Ordinary class, I choose Hafei, that's what I use.
Minyi car: engine oil 5W-30 SE oil in winter north of the Yangtze River (165438+1October to March next year) and winter south of the Yangtze River (165438+1October to March next year)15w-40.
Horse racing: South in summer and North in summer: SAE 15W-40 SE engine oil, and North in winter: (165438+1October to March of the following year) SAE 5W-30 engine oil, SG grade and above.
Lvbao: the whole year in the south, the summer in the north: SAE 15W-40, and the winter in the north: (June to March) SAE 5W-30, SG and above.
3. Four-wheel alignment parameters:
popular will
Toe camber 1 30'
The pivot pin is tilted 9 degrees and 30 minutes.
The kingpin is tilted backward by 3 0 degrees.
Toe (mm) 2-5
horse race
The camber angle of the kingpin is 0 30.
King pin inclination12 20'130'
The kingpin tilts backward for 2 degrees, 50 minutes and 30 seconds.
Toe (mm) 1 2
Lubao
Wheel camber 22' 30'
King pin tilt 1 1 56' 1.
Casters are 4 30' 1.
Toe (mm)-1 ~ 4 mm
4. About tires:
A, tire pressure b, tire model
Public opinion (before/after) (kPa) No load: 220/300
Fully loaded: 260/400 155R 13LT
Horse racing (front/back) (kpa) 200/180185/65r1486s
Lubao (front/back) (kPa) 220/200 165/65R 13
About tire marking
Tire is an important part of automobile. Correctly identifying these signs is very important for the selection, use and maintenance of tires, and is of great significance for ensuring driving safety and prolonging the service life of tires.
Tire size: specification is the symbolic data of tire geometric parameters and physical characteristics. Tire size is usually represented by a set of numbers, the former number represents the tire section width and the latter number represents the rim diameter, all in inches. The letters or symbols in the middle have special meanings: "X" stands for high pressure tire; "R" and "Z" represent radial tires; "One" refers to the low-pressure tire.
Level: Level refers to the nominal number of plies in the tire rubber layer, which is not completely consistent with the actual number of plies, and is an important indicator of tire strength. Grades are marked in Chinese, such as 12; Mark in English, such as "∑ 14P". R ",namely 14 layer pole.
Cord material: some tires are marked separately, such as "nylon", which is generally marked after the hierarchy; Some tire factories in the world use Chinese pinyin initials to mark specifications, such as 9.00-20N and 7.50-20G. N stands for nylon, G stands for steel wire, M stands for cotton thread, and R stands for rayon.
Load and air pressure: generally, it means the maximum load and the corresponding air pressure. The load is in "kg" and the air pressure is in "kPa".
Rim specification: indicates the rim specification matched with the tire. Convenient for practical use, such as "standard rim 5.00F".
Balance sign: made of colored rubber, printed on the sidewall, indicating that the tire is the lightest here, and it should be assembled right against the valve to ensure the balance of the whole tire.
Rolling direction: The tread pattern on the tire is particularly critical for drainage and anti-skid during driving. Therefore, the rolling direction of off-road vehicle tires with asymmetric tread patterns is often marked with arrows to ensure the adhesion and anti-skid performance of the design. If it is not installed correctly, it will be counterproductive.
Wear limit sign: The wear limit of the tire is marked on one side of the tire with a rubber strip and a block. Once the tire wear reaches this mark position, it should be replaced in time, otherwise it will burst because of insufficient strength.
Production batch number: a set of numbers and letters are used to indicate the year and quantity of tire manufacture. For example, "98N08B5820" means the 5820th tire produced by Group 65438+B in August 1998. The production batch number is used to identify the newness and storage time of tires.
Trademark: Trademark is the symbol of tire manufacturers, including trademark words and patterns, which are generally prominent and easy to identify. Most of them are marked with the name of the manufacturer.
Other marks: such as product grade, production license number and other subsidiary marks. It can be used as reference materials and information when choosing.
Tire signs are generally marked in a standardized way, so you can buy and use them with confidence after being clearly marked.
The following are common tire size representations:
For example: 185/70R 1486h.
185 tread width (mm)
70 Flatness ratio (tire height/tire width)
R meridian structure
14 diameter of steel ring (inch)
86 load index (indicating that the corresponding maximum load is 530 kg)
H speed code (indicating that the maximum safe speed is 2 10 km/h)
About tire purchase
Knowing the basic knowledge of tires is only the first step. The next step is to consider how to buy tires that suit your car. When choosing, in addition to knowing the tire size your car needs, you should also pay attention to the following aspects.
First of all, give priority to the original tires, which can best match the speed and maximum load of the car. Therefore, in theory, tire replacement should be given priority.
Second, pay attention to the tire pattern. The patterns on automobile tires not only have aesthetic effect, but also have great influence on tire performance. Cars that often drive in Shenzhen should choose those patterned tires with good drainage, such as regular small patterns; For cars that need cross-country and long-distance running, you can choose large patterns.
Finally, if you are not satisfied with the original handling of the vehicle, you can consider replacing the tires with lower flattening rate. For many models, one of the most effective ways to improve the appearance and handling performance of vehicles is to replace the tires with low flattening rate. Each type of tire has its specific function, so when choosing a tire, you should ask what type of tire is suitable for what kind of driving habits, so that the car is safer when driving and the money spent on tires is more worthwhile.
When buying tires, don't just look at the price, ask professionals who will help you match the right tires accurately.
When choosing tires, we should also be careful not to mix different types of tires, such as putting tires suitable for off-road vehicles together with ordinary cars, or mixing tires for directional sports cars with ordinary tires.
Of course, try to avoid retreading tires when buying. At present, Shenzhen, especially some street shops, often sell some refurbished tires as inferior products, so consumers must pay attention when purchasing. The way to identify a retreaded tire is simple: the most common way is to observe the color of the tire. Refurbished tires are dull in color, so don't buy such tires blindly.
Professional masters identify tires by the marks on them. There are some protruding marks on the car tires, indicating the model and performance of the tires. These are the breakthrough points in identifying retreaded tires. The signs of retreaded tires are re-attached after retreading, and these signs of brand-new tires are integrated with the tires. The identification method is to scrape these signs with your nails. Generally, these signs of retreaded tires are not tightly affixed, and what can be caught must be retreaded tires.
What is the speed grade of the tire?
A: The speed grade officially indicates the maximum speed at which the tire can bear the specified load under the specified conditions. The letters A to Z represent the certification speed class of tires, ranging from 4.8 km/h to 300 km/h. ..
Commonly used speed levels are:
Q160km/h V 240/h
R170km/h W 270/ h
S180km/h Y 300/ h
T 190km/h Z ZR speed is higher than 240km/h.
H 2 10 km/h ZR If ZR appears in the tyre size of the instruction manual. For example, P275/40ZR 17 93W, and the highest speed level ("W" in "93W") is 270 km/h. ..
In the recent regulations on standardization of tire identification, except for the stepless speed change Z speed grade, the descriptions of all grades include speed symbols and load factors. For example, P225/60R 15 95H is the specification of the tire, indicating that the maximum load of the tire is 690kg and the maximum speed grade is 210 km/h. ..