What do the letters in tire ratings represent?

1 Answers
LeJocelyn
07/30/25 1:26am
Tire rating letters indicate the speed rating of the tire. Below is a detailed explanation of the tire letter ratings: 1. The letters corresponding to speed ratings represent the speed grade of the tire, which indicates the speed at which the tire can carry a specified load under defined conditions. Tires are rubber products mounted on metal rims that roll on the ground, fitted to vehicles or machinery. 2. Letters from A to Z represent certified speed ratings for tires ranging from 4.8 km/h to 300 km/h. Common speed ratings include: Q-160 km/h; R-170 km/h; S-180 km/h; T-190 km/h; H-210 km/h; V-240 km/h; W-270 km/h; Y-300 km/h; Z: ZR speed above 240 km/h.
Was this review help?
2
2
Share
More Forum Discussions

Transmission Issue with 2013 Ford EcoSport?

For the transmission issue with the 2013 Ford EcoSport, it is necessary to visit a professional service center to read the fault codes using a diagnostic computer and resolve the problem. Below is relevant information about the transmission: 1. Function: The hold button adjusts the ideal driving state according to different driving conditions, effectively preventing the transmission from frequently shifting on poor road surfaces and serving as a forced downshift (without upshifting) during overtaking. 2. Transmission Classification: Automotive transmissions are divided into manual and automatic types. Manual transmissions mainly consist of gears and shafts, achieving speed and torque variation through different gear combinations. Automatic transmissions (AT) are composed of a torque converter, planetary gears, a hydraulic torque variation system, and a hydraulic control system, achieving speed and torque variation through hydraulic transmission and gear combinations.
11
3
Share

What Materials to Bring for Vehicle Inspection in Beijing?

Beijing vehicle inspection requires the following materials: 1. Original vehicle registration certificate; 2. Original ID card of the person coming for inspection; 3. Original valid insurance policy (for compulsory traffic insurance, only the copy retained by the traffic management department is required). Vehicle annual inspection refers to the annual examination of vehicles that have obtained official license plates and registration certificates, conducted according to the technical conditions for motor vehicle operation safety. The purpose of vehicle inspection is to check the main technical conditions of the vehicle, urge the strengthening of vehicle maintenance, keep the vehicle in good condition, and ensure driving safety. Vehicle annual inspection items include checking whether the engine, chassis, body, and their accessories are clean, complete, and effective; and whether the paint surface is uniform and aesthetically pleasing.
13
0
Share

How to Change the Name on a Driver's License After Changing the Name on an ID Card?

As long as you can prove that the two ID cards belong to the same person, you can go to the vehicle management office, various traffic police teams, or community service centers to apply for a replacement driver's license. When applying, the applicant needs to bring the original and a copy of the ID card, the original driver's license, and two one-inch white-background color registration photos. After passing the review and paying the fee, the applicant can receive a new motor vehicle driver's license. Additional application regulations: 1. If the applicant resides in their registered residence, the application should be submitted there. 2. If the applicant resides in a temporary residence, the application can be submitted there. 3. Active military personnel (including armed police) should submit the application at their place of residence. 4. Foreign nationals should submit the application at their place of residence.
2
0
Share

Does the Touareg belong to FAW-Volkswagen or SAIC Volkswagen?

The Touareg does not belong to either FAW-Volkswagen or SAIC Volkswagen. Although the Touareg was the first SUV model introduced by FAW-Volkswagen, it is actually an SUV produced by Volkswagen AG in Germany. In terms of power, the Touareg is equipped with a 3.0T displacement engine, paired with a 2-speed automatic manual transmission. The engine has a maximum power of 250 kW and a maximum torque of 450 Nm. In terms of body dimensions, the Touareg measures 4878mm in length, 1984mm in width, and 1717mm in height, with a wheelbase of 2904mm. It features a full-time four-wheel-drive system and uses a Torsen differential.
19
3
Share

What are the reasons for the capacity degradation of lithium batteries?

Lithium battery capacity degrades because lithium ions react with the electrolyte during movement, leading to some loss of lithium ions. Therefore, the performance of lithium batteries decreases as the number of charge-discharge cycles increases, which is quite normal. Automotive lithium batteries are the power batteries used in hybrid and electric vehicles, offering advantages such as high energy density, large capacity, and no memory effect. To address the issue of lithium battery degradation, it is necessary to develop new electrolytes that can prevent reactions between lithium ions and the electrolyte. There are generally two types of lithium batteries used in pure electric vehicles: lithium iron phosphate batteries and ternary lithium batteries. The cathode of ternary lithium batteries is made from ternary materials.
12
1
Share

What brand is Aoluka?

Aoluka is a new generation pickup truck produced by Haima Zhengzhou (Zhengzhou Light Vehicle Co., Ltd.). As the first product of Haima Zhengzhou, Aoluka is positioned as a 'new generation spacious and comfortable pickup truck', advocating the car culture of 'true partners' and bringing users a different driving experience. After being redesigned by Haima, the Aoluka pickup incorporates many sedan-like elements, with both the interior design and the overall vehicle craftsmanship being very refined. Additional information: Aoluka uses an engine assembled with genuine Isuzu Japan's original key component technology, which is different from the more commonly used engines in the market that are assembled with domestic parts using Isuzu technology. It excels in power, fuel consumption, and environmental protection, especially in terms of product quality assurance, which is unmatched.
16
5
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.