Understanding Tire Wear on Trailers: Beyond Just Rolling
Many people think that trailer tires do not experience wear when the trailer is simply rolling. However, as we will explore in this article, there are several factors that contribute to tire wear even when the trailer is not subjected to braking or acceleration. Understanding these factors is crucial for maintaining safe and efficient operation of trailers.
The Role of Turning in Tire Wear
When a trailer is turning, particularly under the load of people or materials, specific tires on each side of the trailer experience significant wear. During a turn, one or both tires on each side of the trailer can be dragged sideways. This sideways pulling is a result of the trailer's geometry, which means that even on a flat, unloaded section of road, tire wear can occur. The combination of this sideways dragging and the natural resistance in the trailer's axles (which can be thought of as a type of friction) can cause significant wear. At full load, trailers are rarely pulled empty, which further increases the likelihood of this type of wear.
Sun Damage and Tire Wear
Another factor contributing to trailer tire wear is the sun's effect on the rubber compound. Regular exposure to sunlight can cause oxidation, weakening the rubber over time. This is particularly problematic when combined with the sideways dragging of the tires during turns, as it can lead to rapid deterioration of the tire's rubber. The combination of these factors can cause a significant amount of rubber to be worn off quickly, even without the added stress of braking or acceleration.
Tire Wear Due to Centrifugal Force and Compression
Beyond the effects of turning, there are several other factors that can contribute to tire wear on trailers. When a trailer is turning, the centrifugal force causes the trailer to try to slide out. The grip of the tires is crucial in preventing this slide, but this grip also causes wear on the tires as they are forced to hold the weight of the trailer against the road surface. Additionally, the weight of the trailer itself compresses the tires into the road surface, causing a small amount of rubber to wear off with each rotation. This phenomenon occurs even when the trailer is stationary, making it clear that the tires are not simply "rolling along" without any wear.
While the tires on the main vehicle typically experience more wear due to factors like braking and steering, even the tires on the trailer experience some degree of wear. This is evident in the design of shopping trolleys, which, despite their relatively easy movement, still have tires that wear out over time. The same principle applies to trailer tires, even when the trailer is not undergoing braking or acceleration.
The Importance of Trailer Brakes
It is important to note that many trailers, especially those loaded with materials, have a brake connection. Even without manual braking, the weight of the load can cause the trailer's brakes to engage slightly, contributing to tire wear. This is particularly noticeable in heavy-duty applications, such as those used in the transportation of goods by big-rig trucks. In these scenarios, the brakes play a crucial role in maintaining control and safety, but they also contribute to tire wear.
In conclusion, the tires of a trailer experience wear even when the trailer is simply rolling. Factors such as turning, sun damage, the effects of centrifugal force, and the compression from the trailer's load all contribute to this wear. Understanding these factors is key to maintaining the longevity and safety of your trailer's tires.
Beyond this, regular maintenance, proper tire pressure, and the use of quality tires can help to minimize any unnecessary wear. By vigilant use and proper care, you can ensure that your trailer's tires perform optimally and last as long as possible.