European ultra-wide single-tire tractor Puyang Shangyi Decoration Material Co., Ltd. , https://www.pysydecoration.com
The standard transportation is prevalent, and lightweight tractors have become the new darling of the market. It is difficult to find weight reduction of parts and components after the weight reduction of various parts and components is achieved between cost and quality. Some manufacturers have put their eyes on the tires of the drive wheels. The traditional tractor drive wheels are equipped with double tires to ensure the carrying capacity of the vehicle. Replacing it with a “big single tire†with a wider cross section can reduce the weight by about 70%. Recently, there have been many manufacturers on the Internet with a large single-tire model announcement photographs are circulating, is expected to be seen in the market soon.
Large single-tire tractors are nothing new. In the past few years, when trucks became popular and lightweight, there were many large single-tire models sold. Large single tires whose advantages appeared to be particularly large did not eventually become mainstream, even on trailers. Why did you not get fire? Will the new GB1589 implementation this year again promote the development of large singletons? 
What are the advantages of highlighting large single-tire models in Europe?
In Europe, the total number of trucks does not exceed 40 tons, trailers mostly use 385/65R22.5 single tires to meet the load demand, and some tractors will use 385 wide-section tires on the steering wheel to improve the stability at high speeds. Heavy-duty trucks use mainstream tires with 295 and 315 cross-sectional widths, and cross-sections exceeding 315 can be narrowly interpreted as "big singletons."
The advantages and disadvantages of a large single tire need to be divided into installation wheels to distinguish between the instructions. The advantages and disadvantages of installing on the steering wheel and on the driving wheel are not the same. Let's talk about the advantages of using wide-section single tires on steering wheels:
1, beautiful: after the use of wide-section tires steer wheel tire wall and the rim is almost flush, the entire wheel looks full of atmosphere, rims design and playable more patterns, many Europeans are changing 385/65R22.5 are out of Aesthetic considerations.
2. Stable: Wide section tires have a wider section width than 315 or 295 tires, more contact with the ground, vehicle lateral stability will be improved, high-speed driving and rain and snow slippery pavement can better understand the difference between the two the difference.
3, load balancing: road vehicles in this area is not obvious advantages, construction vehicles to go tough muddy road wide-section tires can increase the tire contact area to reduce vehicle pressure on the ground, reduce the probability of car trapping, European engineering vehicles very front-wheel very much like the wide section 385 tires.
The disadvantage of using wide-section tyres for steering wheels is that the fuel economy is poor, the increased contact area needs to consume more energy to offset, and wide-section tyres distorted the chassis pitch of the vehicle, resulting in improved comfort and side-effects. The turning radius of the vehicle will be larger; the wider front wheel is almost flush with the vehicle's cab, the width of the original car fender is insufficient, muddy water is more likely to be thrown to the side of the car body, and the German MAN models are equipped with 385 wide-section tire models. A small mudguard was added to prevent splashing of mud. 
Another application scenario for large single tires is on vehicle drive wheels and on trailer tires. Domestic existing large single tire vehicles use 425/65R22.5 specification tires. It is not difficult to understand that the 425 wide-section tires are used to drive the drive wheels. Why do we use such wide-section tires for trailers? European trailers are as good as 385 wide-section tires, and rolling resistance can be even smaller. It refers to the provisions of GB1589 "Outline dimensions, axle load and quality limits for road vehicles" in 2004. The maximum allowable axle load for trailers using single tires shall not exceed 6 tons. The additional clause states: "The nominal section width is more than 400 ( For metric series or 13.00 (imperial series) axles, the maximum allowable axle load must not exceed the sum of the specified tire loads, and the maximum limit is 10,000 kg.†Wide-area tires with a cross-section of 400 mm or more are used solely for compliance with laws and regulations. The legal loading quality of the vehicle is the same as that of the twin-tire model.
The new regulations on the wide-section tire changes to the domestic large single-ton tractor to fire?
The new implementation of GB1589-2016 this year replaced GB1589 in 2004. The change in a provision for wide-section tires did not attract much attention. The same is a single tire axle on each side, the axle load limit is changed to 7 tons, including the drive shaft and the non-drive shaft. The requirements for the use of wide-section tyres with a width of 400 mm or more in the Additional Provisions of GB1589-2004 have changed to “Axles for tyres with not less than 425 mm in nominal section width, the maximum permissible shaft load limit is 10,000 kg, and the nominal shaft width for driving shafts is no less than 445 mm. The maximum allowable shaft load limit is 11500kg."
The new regulations stipulate the regulations for the use of large single tires on the drive shaft and non-drive shaft. The width of the tire section should not be lower than the commonly used 425 tires at present, and the existing large single tire models will not be affected. If 4x2 tractors use large single tires to reduce their own weight, in order to ensure the maximization of load-bearing quality, it is necessary to use 445mm tires with wider cross-section. Will the manufacturers upgrade all the single-tire models to 445mm tires in order to reduce the hassle? Afterwards have their own conclusions.
The advantages and disadvantages of the 425mm single tire in the driving wheel and the hanging wheel are basically the same, and can be mixed together. Its main selling point is to develop around economics:
1. Fuel saving: The trailer changes from double tires on each side to single tires, with less cross-section, less frictional resistance to the ground, and significantly lower rolling resistance of the vehicle, which helps to reduce fuel consumption. Two 295mm width tires become a 425mm single tire, the cross-sectional width is reduced by about 28%, a three-axis trailer 6 wheels to calculate the equivalent of a twin tire trailer with less than a half tire rolling resistance.
2. Weight loss: The initial purpose of applying a single child is to reduce weight. A 425/65R22.5 single tire weight is 70 to 80 kg lighter than two 295/80R22.5 tires. A 6-axis semi-trailer has 5 axes. With 425 single tires, light tires can lose 700 to 800 kilograms, a very impressive figure.
3, cheap: a 425/65R22.5 large single tire according to the different brands, the purchase price and the same brand 295/80R22.5 slightly more expensive, but it is cheaper than buying two 295/80R22.5 tires.
The advantages of a single-use application, in turn, are its shortcomings. A large single tire reduces the contact area between the tire and the ground to save fuel, but it will cause the braking distance to be longer when braking, because the friction between the tire and the ground is not as great as that of the twin-wheeled model. The lateral stability of the wet road surface will be weak, unless the vehicle is widening the frame for a single tire model to make up for this deficiency.
The carrying capacity of single-tire models is not as good as that of twins. It is only suitable for standard-load transportation under good road conditions, and the limitations of vehicle use are large. Tire failures must be dealt with as soon as possible, and the number of tires for twin-tire models can be less worrying. Because of the lack of retention, supporting services are incomplete, and failures are difficult to find.
June 25, 2024