What does 100y mean on car tires?

1 Answers
OTeagan
07/30/25 9:22am
Car tire 100y refers to the load index and speed rating of the tire. Here, 100 represents the load index, indicating that the tire can bear a maximum weight of 800kg under normal inflation conditions. The letter y denotes the speed rating, showing that the tire's maximum speed under specified conditions with designated load is 300km/h. The functions of tires include: 1. Supporting the vehicle's entire weight, bearing the car's load, and transmitting forces and moments in other directions; 2. Transmitting traction and braking torque to ensure good adhesion between wheels and road surface, thereby improving the vehicle's power performance, braking efficiency, and passability; 3. Working together with the car suspension to cushion impacts during driving and dampen vibrations; 4. Protecting automotive components from severe vibrations and premature damage, adapting to the vehicle's high-speed performance while reducing driving noise.
Was this review help?
1
3
Share
More Forum Discussions

Should You Press the Clutch or Release the Throttle First When Shifting Gears?

When shifting gears, you should release the throttle before pressing the clutch. Here is an introduction to gear shifting: 1. The reason for releasing the throttle before pressing the clutch: The primary goal of shifting gears is to ensure the engine speed is sufficient. Generally, it's best to shift gears when the engine speed is between 2000-3000 RPM. If you release the throttle without pressing the clutch, the engine speed will drop, leading directly to engine braking. To protect the engine, strictly speaking, you must release the throttle first. 2. Consequences of incorrect operation: If you press the clutch without releasing the throttle, the connection between the engine and the drive wheels is severed. The engine will have no load, but since the throttle isn't released in time, the engine speed will surge, or you may hear a sudden roar from the engine.
10
3
Share

What is the reason for the starter sometimes not responding when starting?

The reasons why the starter does not respond when starting: there is a problem with the control circuit of the starter; the starter brushes are faulty; the battery does not have sufficient voltage; the relay is malfunctioning; poor contact of the starter's magnetic switch, etc. Common faults and phenomena where the starter often fails to rotate or rotates slowly are as follows: 1. The battery is dead or weak: resulting in the starter not rotating or rotating slowly. 2. Loose or detached starter wiring: switch or adsorption switch failure. 3. Worn brushes or misaligned brush surface: weak spring, leading to poor contact with the commutator. 4. Short circuit or open circuit in the field coil or armature coil. 5. Dirty commutator: protruding mica sheets causing poor contact between the brushes and the commutator.
9
2
Share

What is the Difference Between Transmission Fluid and Engine Oil?

Theoretically, engine oil and transmission fluid serve the same primary functions, including lubrication, cleaning, rust prevention, and heat dissipation. The differences between them lie in viscosity and the temperatures they can withstand. Engine oil is used for the normal operation of the engine, enduring the highest temperatures and having the lowest viscosity, while transmission fluid is used for the transmission, withstanding lower temperatures and having a higher viscosity than engine oil. The specific differences are as follows: 1. The Role of Transmission Fluid: The main function of transmission fluid is to keep the car's gear system clean, providing lubrication and cooling. It's important to note that during driving, the gears operate at high speeds, generating heat through friction. At this point, transmission fluid is needed to lubricate and reduce temperature, ensuring the vehicle operates normally. 2. The Role of Engine Oil: Engine oil primarily lubricates the engine system, providing lubrication, cooling, sealing to prevent leaks, rust and corrosion prevention, as well as shock absorption. The condition of the engine oil can directly affect the performance and lifespan of the engine, making it a crucial automotive consumable. Therefore, car owners should pay special attention to the use of engine oil in daily maintenance.
11
3
Share

What are the procedures for importing cars?

Importing cars involves the following procedures: 1. Certificate of Imported Goods: (commonly known as the "Customs Declaration") The full name of the Customs Declaration is the Certificate of Imported Goods, also called the "Dock Receipt". It is a receipt issued by customs and serves as an important "ID card" for parallel imported cars. It is a crucial document for customs clearance. Without this identification, parallel imported cars cannot be registered. 2. Content of the Customs Declaration: It can identify the specific model of the car, and the production location refers to the final place of production, not the country of origin. Parallel imported cars refer to vehicles purchased by traders from overseas markets and introduced into the Chinese market for sale without authorization from the brand manufacturer.
17
5
Share

What is the shelf life of a car fire extinguisher?

Car fire extinguishers have a shelf life of about 1 year. Here are some relevant details about car fire extinguishers: 1. Car fire extinguishers are specifically designed for vehicle fire suppression and are divided into two types: vehicle-mounted stored-pressure suspended ultra-fine dry powder automatic fire extinguishing devices, and mini-vehicle stored-pressure suspended ultra-fine dry powder automatic fire extinguishing devices. 2. Usage method: Bring the fire extinguisher near the fire site, stand on the upwind side, pull out the safety pin, hold the spray nozzle with one hand and the pressure handle with the other, aim the nozzle at the base of the flames and sweep. 3. Storage location: Keep it in an easily accessible place and secure it in the trunk. 4. Precautions: Carbon dioxide fire extinguishers and water-based fire extinguishers need to be kept upright.
8
4
Share

What is the emission standard for a 10-year-old car?

2010 cars could meet either China IV or China III emission standards, depending on the specific vehicle model. Additional information: 1. Vehicle emission standards can be roughly estimated based on the registration year: (1) Cars registered before 2005 are generally China II standard. (2) Cars registered before 2007 are mostly below China IV standard (China II or China III). For cars registered in 2007, some meet China III while others meet China IV. (3) Most cars registered after 2008 meet China IV standard. 2. Differences between China II, China III and China IV: (1) There's no significant difference between China II and China III vehicles, mainly just variations in displacement, with no changes to the core vehicle functions. (2) The implementation of China IV emission standard has effectively reduced emissions of pollutants including HC (hydrocarbons), NOx (nitrogen oxides), CO (carbon monoxide), and PM (particulate matter).
1
2
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.