Widest 22 inch tire

The biggest tires in the world

If the wheels of a giant mining dump truck are worn out, the miners will face serious expenses: each such tire costs as many cars. You can save only on balancing - it is useless for slowly rotating wheels of dump trucks.

Do you know what determines how gigantic new dump trucks will be? Not only from the desires of large customers and marketing research of dump truck manufacturers.

Tire workers are the determining link.

After Michelin launched the first radial mining truck tire in 18. 00R25 (18 is the tire width in inches) in 1959, the entire mining industry began to follow the achievements of French engineers with interest. The larger the tire and the load that it is able to take on, the higher the load capacity of the dump truck and the more profitable the business. It is not easy to develop durable tires capable of withstanding loads of tens of tons - this was an obstacle at the beginning of the journey. Truly gigantic cars began to appear only at 1970s, when the right "shoes" appeared.

Before 1964, the largest radial tire was 39 inches, but by the end of the decade, the limit was 51 inches. The real breakthrough in the industry came in 1976 when Michelin introduced the 57-inch 40.00R57 tire. This led to a surge in megalomania in the mining industry. For more than two decades, 57 inches has been the limit. But in the late 1990s, Caterpillar decided to develop a mining truck with an unprecedented payload capacity (345 tons) - the Model 797B. It was then that the first 63-inch tire was born - the development of Michelin. This indicator was derived based on the maximum possible total weight of the machine - 624 tons, limited by the capabilities of tires. The maximum load of one 63-inch tire is 104 tons, there are six wheels in total, and the weight between the axles of the car is distributed proportionally. As it is easy to calculate, 624 tons is really the limit.

However, in terms of carrying capacity, Caterpillar is now No. 2 in the world. In 2004, the Liebherr T 282 B dump truck debuted with a load capacity of 363 tons, which was dubbed the "eighth wonder of the world" in the press. It was possible to achieve such a high indicator by reducing the dead weight of the machine: the gross weight of the dump truck is 592 t.

The largest tires today are 59/80R63. Only two manufacturers produce them in series - the Michelin and Bridgestone concerns. The Michelin 59/80R63 XDR tire has an extra-deep tread, due to which it stands out for its long service life, but, accordingly, the high price of $60,000 per balloon.

The Michelin 59/80R63 XDR tire weighs over 5 tons! The giant wheel can withstand a load of more than 100 tons, and especially high demands are placed on its strength. In this regard, the composition of the tire includes 890 kg of steel! The main material, of course, is rubber: it contains 3850 kg in a tire - it would be enough to produce about 600 passenger tires.

Will even bigger tires be available soon? The answer is no. “Transportation makes it impossible to produce larger diameter tires,” explains Louis-Gayol Kaineck, marketing director for Michelin's Heavy Duty Tires division. Every year, the company sends thousands of giant tires to remote areas of the planet - by ships, planes, rail and road trains.

According to an international study, the largest possible tire diameter for transportation with all these methods is 4.3 m, and the outer diameter of the largest Michelin tires at the moment is 4.03 m. its load, but this will require large investments, and the effect will be insignificant. So "63 inches" is the limit for today, and a new round of gigantomania is not expected in the near future.

The path of least resistance

Although all cars have been running exclusively on radial tires for many years, bias tires were installed on some BelAZ dump trucks relatively recently. Such wheels are characterized by a simpler design, cheaper to manufacture, distinguished by the strength of the sidewalls, but high rolling resistance (respectively, increased fuel consumption) and a shorter service life negate their advantages. That's why Michelin stopped making bias-ply tires for mining trucks back in 1980, and the Bobruisk enterprise "Belshina", which previously supplied BelAZ with diagonal tires, now produces mainly radial tires (more than 90% of its products). Since the development and production of giant tires is not an easy task, tires for relatively small BelAZ dump trucks are produced in Bobruisk, and Bridgestone and Michelin tires are purchased for the giants.

If anyone was wondering what are the biggest tires in the arsenal of the American company Goodyear, then this is the Goodyear RM-4A + size 59/80 R63, which are the same size and about the same weight as an elephant. These OTR (Off-The-Road) tires are designed for the largest dump trucks used in the mining industry.

Goodyear Giant Tires are sold all over the world and installed on dump trucks working in quarries where coal, gold, copper, etc. are mined. The outer diameter is 4.023 meters, which is more than the allowed height of trucks in most European countries. Basketball hoops are a meter below. The weight is 5.4 tons, the carrying capacity is 100 tons, and the maximum speed is 50 km/h.

63-inch tires with metal frame and belt. They were created using the latest computer modeling technologies, and the development was carried out in cooperation with manufacturers of mining equipment. The tires are made from a special Cool-Running CycleMax compound that reduces heat generation. Grooves in the center of the tread can interlock for increased stability, while reinforced sidewalls provide additional protection. Goodyear RM-4A+ available in sizes 53/80 R63 and 59/80 R63. Versions are offered with three types of rubber compound and different tread depths (E3 and E4).

This is a copy of the article located at https://masterokblog.ru/?p=62767.

Tags: Technology

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The biggest tires in the world

If the wheels of a giant mining truck are worn out, the miners will face serious expenses: each such tire costs as many cars. You can save only on balancing - it is useless for slowly rotating wheels of dump trucks.

Do you know what determines how gigantic new dump trucks will be? Not only from the desires of large customers and marketing research of dump truck manufacturers.

The determining link is tire workers.

After Michelin released the first radial tire for mining trucks in 18. 00R25 (18 is the tire width in inches) in 1959, the entire mining industry began to follow the achievements of French engineers with interest. The larger the tire and the load that it is able to take on, the higher the load capacity of the dump truck and the more profitable the business. It is not easy to develop durable tires capable of withstanding loads of tens of tons - this was an obstacle at the beginning of the journey. Truly gigantic cars began to appear only at 1970s, when the right "shoes" appeared.

Before 1964, the largest radial tire was 39 inches, but by the end of the decade, the limit was 51 inches. The real breakthrough in the industry came in 1976 when Michelin introduced the 57-inch 40.00R57 tire. This led to a surge in megalomania in the mining industry. For more than two decades, 57 inches has been the limit. But in the late 1990s, Caterpillar decided to develop a mining truck with an unprecedented payload capacity (345 tons) - the Model 797B. It was then that the first 63-inch tire was born - the development of Michelin. This indicator was derived based on the maximum possible total weight of the machine - 624 tons, limited by the capabilities of tires. The maximum load of one 63-inch tire is 104 tons, there are six wheels in total, and the weight between the axles of the car is distributed proportionally. As it is easy to calculate, 624 tons is really the limit.

However, in terms of carrying capacity, Caterpillar is now No. 2 in the world. In 2004, the Liebherr T 282 B dump truck debuted with a load capacity of 363 tons, which was dubbed the "eighth wonder of the world" in the press. It was possible to achieve such a high indicator by reducing the dead weight of the machine: the gross weight of the dump truck is 592 t.

The largest tires today are 59/80R63. Only two manufacturers produce them in series - the Michelin and Bridgestone concerns. The Michelin 59/80R63 XDR tire has an extra-deep tread, due to which it stands out for its long service life, but, accordingly, the high price of $60,000 per balloon.

The Michelin 59/80R63 XDR tire weighs over 5 tons! The giant wheel can withstand a load of more than 100 tons, and especially high demands are placed on its strength. In this regard, the composition of the tire includes 890 kg of steel! The main material, of course, is rubber: it contains 3850 kg in a tire - it would be enough to produce about 600 passenger tires.

Will even bigger tires be available soon? The answer is no. “Transportation makes it impossible to produce larger diameter tires,” explains Louis-Gayol Kaineck, marketing director for Michelin's Heavy Duty Tires division. Every year, the company sends thousands of giant tires to remote areas of the planet - by ships, planes, rail and road trains.

According to an international study, the largest possible tire diameter for transportation with all these methods is 4.3 m, and the outer diameter of the largest Michelin tires at the moment is 4.03 m. its load, but this will require large investments, and the effect will be insignificant. So "63 inches" is the limit for today, and a new round of gigantomania is not expected in the near future.

The path of least resistance

Although all cars have been running exclusively on radial tires for many years, bias tires were installed on some BelAZ dump trucks relatively recently. Such wheels are characterized by a simpler design, cheaper to manufacture, distinguished by the strength of the sidewalls, but high rolling resistance (respectively, increased fuel consumption) and a shorter service life negate their advantages. That's why Michelin stopped making bias-ply tires for mining trucks back in 1980, and the Bobruisk enterprise "Belshina", which previously supplied BelAZ with diagonal tires, now produces mainly radial tires (more than 90% of its products). Since the development and production of giant tires is not an easy task, tires for relatively small BelAZ dump trucks are produced in Bobruisk, and Bridgestone and Michelin tires are purchased for the giants.

If anyone was wondering what are the biggest tires in the arsenal of the American company Goodyear, then this is the Goodyear RM-4A + size 59/80 R63, which are the same size and about the same weight as an elephant. These OTR (Off-The-Road) tires are designed for the largest dump trucks used in the mining industry.

Goodyear Giant Tires are sold all over the world and installed on dump trucks working in quarries where coal, gold, copper, etc. are mined. The outer diameter is 4.023 meters, which is more than the allowed height of trucks in most European countries. Basketball hoops are a meter below. The weight is 5.4 tons, the carrying capacity is 100 tons, and the maximum speed is 50 km/h.

63-inch tires with metal frame and belt. They were created using the latest computer modeling technologies, and the development was carried out in cooperation with manufacturers of mining equipment. The tires are made from a special Cool-Running CycleMax compound that reduces heat generation.

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