What does 400-12 mean for tires?

[LaStella]

400 indicates the tire section width (MM), and 12 indicates the rim outer diameter. Here are the related introductions: 1. Function: The main functions of tires are: to support the full weight of the vehicle, bear the load of the car, and transmit forces and moments in other directions, to transmit traction and braking torque, to ensure good adhesion between the wheels and the road surface, to work with the car suspension to mitigate the impact during driving and to dampen the resulting vibrations. 2. Safety: To prevent severe vibrations and early damage to car components, to adapt to the high-speed performance of the vehicle and reduce driving noise, ensuring driving safety, handling stability, comfort, and energy-saving economy.

[NaomiAnn]

I often come across this when repairing vehicles. 400-12 is the standard notation for tire size, where 400 refers to the width of the tire in millimeters, which is the distance at the widest point of the tire's cross-section. As for the 12, it represents the rim diameter in inches. Simply put, it's the size of the metal wheel on which your tire is mounted. This size is commonly seen in small engineering vehicles or agricultural tractors because wider tires enhance grip and stability. If you're replacing a tire, the size must be an exact match; otherwise, the tire will wear out quickly, braking distance will increase, and there's even a risk of a blowout. I always emphasize this when checking a vehicle for the owner—never opt for a smaller size to save money. Always check the vehicle manual to confirm the parameters first. Maintaining the correct size during daily driving ensures the vehicle is durable and safe.

[McEleanor]

As an ordinary person using farm vehicles, I'm very familiar with the 400-12 specification. It indicates a tire width of 400 millimeters and a rim diameter of 12 inches. This type is commonly used on our family tractors - the wide tires provide better stability in muddy or rugged terrain with less slipping. I still remember once buying tires with incorrect dimensions, which resulted in awkward handling, increased fuel consumption, and rapid tread wear. Accurate sizing is truly important - when replacing tires, don't just look at the price, but also check brand compatibility. I recommend choosing products from reliable manufacturers and regularly checking tire pressure and wear conditions, which can significantly extend vehicle lifespan. If abnormal dimensions are found, promptly visit a repair shop for adjustment to prevent potential hazards.

[VanSimon]

Bro, 400-12 is the basic code for tires. 400 represents the width in millimeters, and 12 is the rim size in inches. This size is commonly found on off-road vehicles or light trucks and affects handling. If the size is incorrect, it can cause unstable steering and increased fuel consumption when driving. From my experience, always check your vehicle's manual for matching data before buying tires—don't just go for the cheapest option. Safe driving relies on these details, and regular maintenance can help reduce issues.