Large single tire weight is lighter and more fuel efficient, will it become a trend?

With the rapid development of the logistics industry, the continuous acceleration of e-commerce express delivery and the continuous increase of freight volume, more and more logistics and transportation enterprises have begun to calculate the operating costs, which is more and more attention to the use of trailer tires. Low roll resistance, small specifications and other types of tires are emerging in an endless stream, among these tires, the emergence rate of large single tires is getting higher and trailer axle higher.

So in what conditions is a large single suitable for use? What are the advantages?

It's not as simple as replacing the tires and matching the axle

The so-called large single tire mainly refers to the cross-sectional width of the tire to be large enough, such as 425mm, 445mm and other cross-sectional width of the tire, can be used to replace the double wheel on the trailer axle, so that each side of the axle only needs to install a tire, equivalent to only 6 tires on a three-axle semi-trailer, ordinary trailer and install twin tires, a total of 12 tires.

Of course, there were also large single tires with a cross-section width of 385mm in China before, but with the implementation of the new GB1589 in 2016, it has gradually withdrawn from the market. It is reported that the new standard requires the use of non-drive shaft section width of not less than 425mm tires, obviously 385mm large single tire is not suitable.

At present, the domestic application scenarios of large single tires are mainly concentrated in the field of trailers, and there will be relatively fewer tractors and trucks. In addition, some card friends also misunderstand the large single tire trailer, and think that as long as the twin tires on the trailer are replaced by a large single tire, in fact, such a practice has great safety risks.

Remember before in the logistics park parking lot to see a double tire to change the single tire trailer, that is, in the ordinary double tire trailer bridge mounted a 385mm or 425mm large single tire, you can obviously see the trailer wheel gauge is not normal, toward the frame more than 10-20 cm, just from the visual can feel the stability of the trailer will be very poor.

When this type of axle is not optimized and debugged with a large single tire trailer, driving under full load or relatively high loading center of gravity, facing complex mountain roads, sharp turns and even overwhelming relatively deep ruts, its hidden dangers are still relatively large.

However, with the improvement of regulations and the rapid development of the large single tire market, many trailer companies have developed and launched exclusive trailers suitable for large single tires for the use of large single tires, which have been further improved in terms of driving stability, anti-roll ability and overall matching. And this large single-tire trailer is usually equipped with aluminum alloy wheels, aluminum alloy frame and lightweight plate springs, air bag axle, etc., so that the trailer can achieve excellent lightweight performance and achieve lower weight.

Light weight and fuel saving also need to accurately match the working conditions

Many card friends believe that the large single tire driving stability is poor, the bearing capacity is not strong, the braking distance is long, the driving force is insufficient, and the maintenance and replacement are also troublesome. Indeed, due to congenital physical trailer axle characteristics, the overall adaptability and practicality of large single babies are not as good as that of twin babies. So what's the point of introducing large single babies? Doesn't it have any advantages?

In the final analysis, in the right working conditions, the large single can play its due characteristics. First of all, under the strict environment, the lighter the vehicle weight, the more goods pulled under the standard, which can improve the actual benefits and transportation efficiency of the team and card friends to a certain extent. Compared with the semi-trailer that drives twin tires, the weight reduction advantages of large single tires are very obvious.

Generally speaking, if you count the wheels, 425/65R22.5 large single tire is 70-80kg lighter than the two 285/80R22.5 twin tires, if the three-axle trailer uses six large single tires to replace the twin tires, then the overall weight loss can reach 420-480kg or so, the effect can be said to be very prominent.

In addition to the lightweight effect, the large single tire can also effectively increase the cargo capacity of the cargo car. If the large single tire of 445/45R19.5 specification is assembled on the three-axle trailer, and the twin tire of 315/60R22.5 specification is installed on the rear drive wheel of the 6x4 tractor, and the cargo compartment volume can be raised by up to 6.5 square meters, which is very suitable for the generous amount of light throwing goods.

Obviously, such a tire configuration can make the chassis height drop to a certain extent, and the chassis height is relatively lower, the overall height of the cargo can be higher, and the volume is naturally larger.

Of course, for card friends and transport teams, there is one of the biggest advantages is fuel saving, especially in today's high oil prices, everyone's sensitivity to vehicle fuel consumption is becoming more obvious.

Compared with the trailer with two tires, the contact area of the large single tire is certainly much smaller, and the resistance at high speed cruise will be lower. If the three-axle trailer is equipped with 425/65R22.5 specifications of large single tires, and the tractor drive shaft is also installed with large single tires, the fuel consumption of 100 kilometers can be reduced by about 6%, according to the calculation of 35 liters of fuel consumption of 100 kilometers, that is, about 2 liters of fuel can be saved. For the total number of vehicles, and thousands of kilometers, almost no parking long-distance express companies, can directly save a small amount trailer axle of cost.

Overall, the main advantages of large single tire is light weight and fuel saving, in long-distance high-speed standard load operating conditions, the effect will be more ideal, can bring more excellent economy for transport enterprises. Of course, if your operation scenario is short near the home, and the working conditions are more complex, and the road is irregular, then the practicality of large single birth may be a different matter.