What is the weight of a tire with a diameter of 1200 millimeters?
3 Answers
Tires with a diameter of 1200mm are generally of the specification 12.00R20–18, typically installed on heavy-duty trucks with a front-four rear-four configuration. The average weight of a single tire is approximately 135 jin (Chinese pounds). The exact weight may vary depending on the brand. Tire specifications and dimensions are represented by a series of codes. Taking the tire size 195/55R15 as an example: 195 indicates the section width, which is the area of the tire that can contact the ground, measured in millimeters. 55 represents the aspect ratio of the tire, which is the ratio of the tire's section height to its section width. R stands for the construction type, with R being the abbreviation for radial tires. 15 denotes the inner diameter of the tire, also known as the rim diameter, usually measured in inches. Here is some additional information about tires: Tires also feature speed rating letters, indicating the maximum speed at which the 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. The functions of tires include: Transmitting driving force, braking force, and steering force to enable vehicle operation; supporting vehicle loads; mitigating and absorbing vibrations and impact forces during driving to prevent severe vibrations from damaging vehicle components.
After all these years in auto repair, I've encountered quite a few 1200mm large tires. This size is typically used for construction vehicles or heavy-duty trucks, and they're seriously heavy! Just the bare tire casing alone, with its rubber and steel belts, weighs a ton. The largest mining truck tires we've installed were around 300 kilograms, while regular trailer tires usually exceed 200 kilograms. But the exact weight depends on the tire type - all-steel ones differ significantly from nylon cord layer ones, and width also plays a role. If you ask me, the best way to know precisely is to check the label on the tire sidewall - it shows the production date, specifications, and net weight.
Just helped a logistics company replace a batch of trailer tires last week, exactly the 1200mm specification. It took three strong men to lift them—estimated around 220-230kg each. These large tires have significant weight variations: tubeless tires are about 20kg lighter than tube-type ones, and winter snow tires are heavier than summer tires. The rim material also matters, with steel wheels being 10+kg heavier than aluminum alloy ones. Remember to perform wheel balancing after replacement, otherwise the steering wheel will shake noticeably at speed. For long-haul operations, it's recommended to check tire wear every 20,000 kilometers.
