Browse

Antiques Collectibles Apparel Baby Kids Items Books， Movies And Music Electronics Free Stuff Garden Outdoor Health Beauty Home Goods Home Improvement Supplies Musical Instruments Office Supplies Pet Supplies Sporting Goods Ticket Toys Games Transportation Others

Used Cars New Cars Others

Business Crafts Design And Web Events Home Improvement Legal Lessons Personal Pets Photography Repair And Technical Support Wellness Writing， Translation， And Transcription Others

Activities & Groups Artists & Musicians Classes & Lessons Events Friendship & Networking Lost & Found Rideshare Sports Teams Volunteers Travel & Travel Partners Skills & Language Swap Other

What are the classifications in the automotive tire grading table?

1 Answers

EmeryAnn

07/30/25 10:52am

Tires use letters from A to Z to represent the certified speed ratings ranging from 4.8 km/h to 300 km/h. The number before the tire specification indicates the tire section width, and the one after represents the rim diameter in inches. Some letters on tires have additional special meanings: "B" denotes bias-ply tires, "C" stands for reinforced tires, "-" indicates low-pressure tires, and "X" signifies high-pressure tires. Specifications: Tire specifications are represented by a combination of numbers and letters printed on the sidewall. The first number indicates the tire section width; the second number represents the aspect ratio; the following letter denotes the tire construction; the next number refers to the rim diameter; and the final number and letter represent the load index and speed rating, respectively. For example: 175/65R15 86H indicates a tire width of 175 mm, an aspect ratio of 65, and a rim diameter of 15 inches. The letter or symbol between the aspect ratio and rim diameter is most commonly "R," which, like "Z," signifies radial tires. Others include "X" for high-pressure tires, "-" for low-pressure tires, and "B" for bias-ply tires. Speed: Speed ratings indicate the maximum speed at which a tire can carry a specified load under defined conditions. Letters from A to Z represent certified speed ratings ranging from 4.8 km/h to 300 km/h. Common speed ratings include: P-150 km/h; H-210 km/h; Q-160 km/h; V-240 km/h; R-170 km/h; W-270 km/h; S-180 km/h; Y-300 km/h; T-190 km/h; Z-ZR for speeds above 240 km/h; and ZR if the tire specification includes ZR in the description.

Was this review help?

10

0

Share

More Forum Discussions

What engine does the Yeti use?

The Yeti is equipped with three engine options: a 1.4-liter turbocharged engine, a 1.8-liter turbocharged engine, and a 1.6-liter naturally aspirated engine. The 1.4-liter variant delivers a maximum horsepower of 150 hp, the 1.8-liter variant offers 160 hp, and the 1.6-liter variant provides 110 hp. The Yeti is a compact SUV produced by SAIC Skoda, with body dimensions of 4275mm in length, 1793mm in width, and 1682mm in height, and a wheelbase of 2638mm. In terms of exterior design, the Yeti features more straightforward lines, a robust and reliable wide front end, and a central skid plate under the front bumper that enhances the overall visual appeal. Equipped with a 4-cylinder turbocharged engine, it delivers strong acceleration, especially at medium speeds, and boasts excellent noise reduction design inside the cabin, ensuring minimal noise.

What is the fuel tank capacity of the New Baojun RS3?

The fuel tank capacity of the New Baojun RS3 is 45 liters. Depending on the model and brand of the vehicle, the fuel tank capacity can vary. Generally, sedan fuel tanks are around 50 liters, while some SUVs have fuel tanks around 70 liters. Some large trucks often come with auxiliary fuel tanks to increase their range. The dimensions of the New Baojun RS3 are 4300mm in length, 1750mm in width, and 1600mm in height, with a wheelbase of 2550mm. The New Baojun RS3 is equipped with a 1.5L naturally aspirated engine, delivering a maximum power of 77kW and a maximum torque of 143Nm. The transmission system is paired with either a CVT or a manual gearbox. The 1.5T version of the New Baojun RS3 features the Baojun family's golden powertrain, utilizing a 1.5T turbocharged engine with a maximum power of 104kW and a maximum torque of 250Nm.

How to Replace the Key Battery for a Maserati?

Maserati key battery replacement tutorial: Turn the car remote key to the back, and you will see that the back cover is divided into two parts. From the side of the key ring, the battery is located under the back cover. Use a screwdriver to move along the gap on both sides, then manually slide the back cover in the closing direction to remove it. Once the back cover is off, inspect the interior to replace the battery. Maserati is an Italian luxury car manufacturer. Taking the Maserati GT as an example: it is a GT sports car under the Maserati brand, with body dimensions of 4881mm in length, 1847mm in width, and 1353mm in height, and a wheelbase of 2942mm. The Maserati GT is equipped with a 4.7-liter V8 naturally aspirated engine across the lineup, paired with a 6AT transmission.

Which year did the Mercedes-Benz C-Class undergo a facelift?

The Mercedes-Benz C-Class underwent a facelift in 2020, replacing the M274 series 1.6T engine in the C180L with a new 1.5T inline four-cylinder engine. Dimensions of the Mercedes-Benz C-Class: The vehicle measures 4975/1850/1450mm in length, width, and height, with a wheelbase of 2870mm. Configuration of the Mercedes-Benz C-Class: The car is equipped with eight safety features, including front/rear side airbags, driver/passenger airbags, and an active brake/active safety system, ensuring a more secure driving experience for users. Headlights of the Mercedes-Benz C-Class: The vehicle comes standard with LED high and low beam headlights. It also features fourteen comfort and convenience configurations, such as an active grille shutter, active noise cancellation, and cruise control, significantly enhancing ride comfort.

What Causes Frequent Low Tire Pressure in One Tire?

The reasons for frequent low tire pressure in one tire may include: a leaking valve stem; wheel rim deformation leading to reduced tire sealing performance; the tire being punctured by a hard object while driving; insufficient initial inflation pressure; or the tire not having its pressure checked and properly topped up for an extended period. Hazards of low tire pressure: Increased friction coefficient with the road surface, leading to higher fuel consumption; Causes heavy steering and alignment issues, compromising driving safety; Excessive movement of tire components results in abnormal heat generation due to over-compression; Degrades the functionality of cords and rubber, causing delamination or cord breakage, and excessive friction with the rim leading to bead damage and abnormal wear; Multiplies friction with the ground, sharply raising tire temperature, softening the tire, and drastically reducing its strength. High-speed driving may then cause a blowout; Increases tire body deformation, making the sidewalls prone to cracking, inducing flexing movements that generate excessive heat, accelerating rubber aging, cord fatigue, and breakage, while also enlarging the tire's contact area and hastening shoulder wear.

Is the 1.5L Mazda 3 Axela Powerful Enough?

Mazda 3 Axela 1.5L engine provides sufficient power. Below are details about the 1.5L engine's performance and other related specifications: Mazda 3 Axela 1.5L Engine Performance: The Mazda 3 Axela is equipped with a 1.5L naturally aspirated engine, delivering a maximum horsepower of 117 PS, a maximum power output of 86 kW, and a peak torque of 148 Nm. It is paired with a 6-speed manual transmission. Other Related Specifications: The Mazda 3 Axela is classified as a compact car, with body dimensions of 4662mm in length, 1797mm in width, and 1445mm in height, along with a wheelbase of 2726mm. It has a fuel tank capacity of 50 liters. The front suspension features a MacPherson strut independent suspension, while the rear suspension utilizes a torsion beam non-independent suspension.

Trending Ranking

What tires are most suitable for the Golf?

What is the cause of the trunk rattling noise in the new Fit?

How to Test an Oxygen Sensor?

What SUV models does Dongfeng Nissan have?

What Causes the Lack of Heating in the Classic Focus Hatchback?

What causes the steering gear of Lavida Hatchback to shake left and right with abnormal noise?

What is the fuel consumption of the Honda Lien Xing?

What is the displacement of the Mercedes-Benz GLC260?

How to set up the steering wheel buttons of Trumpchi GS5?

What are the reasons for the restricted reversing assist system in the BMW 325Li?

More Forum Discussions

Under what circumstances does a driver's license need to be re-learned?

Can a newly purchased car be transferred the next day?

What is the correct parking sequence for one-button start?

What is the minimum required net width and clearance height for a fire lane?

Help

Cookie

Cookie Settings

© 2025 Servanan International Pte. Ltd.