Is Leaf Spring Good?

As an Amazon Associate, I earn from qualified purchases.

Leaf Springs are an essential part of your trailer suspension, so it pays to know how they work. The worst thing about forgetting? You can avoid this problem by paying attention while installing or replacing them.

If you’re like most people, you probably think of leaf springs as the metal coils that support the weight of your car. But what are they? How do they work? And what are their benefits? In this blog post, we’ll answer all those questions and more. So keep reading to learn the truth about leaf springs.

What Are Trailer Leaf Springs?

leaf spring

A trailer leaf spring is a long and narrow plate that is attached to the frame of a trailer. These springs play an important role in providing support for the weight of the trailer, as well as absorbing shock from bumps and other movements. Leaf springs can be located either above or below the axle, and many trailers have multiple springs on each side for added support.

Leaf springs come in two varieties: single-leaf and multi-leaf. The former is typically used for lighter vehicles, whereas heavier towing needs call upon the latter type with greater strength at both ends of its length than what you would find on a mono leather spring; this helps support larger hauls that may require it without sacrificing performance during driving conditions where other factors such as traction are more important.

The shape change from simple semi-living rods into something closer towards an S curve happens because there’s not enough metal near either end – so they’ve got plenty.

There are many different parts of leaf springs. There are add-a-leaf, Centre Pins, Degree Shims, Fitted Leaf, Shackles, Spring Eye Bolt Kits, and Spring Perches/Mounts.

Parts of a leaf spring include the main leaf, which is the primary load-bearing component, as well as smaller leaves, known as Add-A-Leaf’s. These smaller leaves are used to increase the load-bearing capacity of the spring and are typically added when the original spring is beginning to show signs of weakness or fatigue.

The center pins are the main load-bearing components of a leaf spring. They’re located in the middle of the spring, and their job is to transfer the weight of the vehicle to the individual leaves. The pins are attached to each leaf by metal plates, and these plates help keep everything in place while also distributing the load evenly across all of the leaves.

Degree shims are small metal plates used to adjust the alignment of a leaf spring. They fit between the leaves of the spring and are available in different thicknesses to provide the desired degree of adjustment.

Leaf springs are often aligned by eye, but this can be inaccurate and lead to problems with suspension and ride quality. Degree shims can be used to fine-tune the alignment, ensuring that the spring is perfectly straight and providing optimum performance and stability.

Fitted leaf springs have a slightly different construction than other types of leaf springs. They have an extra plate, called a shackle plate, that is attached to the main spring pack. This shackle plate allows the fitted leaf spring to pivot as needed, which provides a smoother ride than other types of leaf springs.

Shackles are the connection point between your leaf springs and chassis. They allow the leaf spring to flex as your vehicle goes over bumps and imperfections in the road. Over time, however, shackles can become worn or damaged. That’s why it’s important to inspect them regularly and replace them if necessary.

Spring eye bolt kits are essential for properly installing leaf springs on your vehicle. The bolts themselves are designed to withstand the extreme forces at play when driving and keep the whole system together. A good quality kit will also include grease fittings, so you can properly lubricate the moving parts of your suspension and reduce wear and tear.

When it comes to leaf springs, there are a few key parts that work together to provide suspension for your vehicle. The spring perches (or mounts) attach the springs to the axles, while the leaves themselves are what deflect and absorb shock from bumps in the road. To ensure that your leaf springs can do their job properly, it’s important to make sure all of these parts are in good condition and working together correctly.

What Are The Advantages Of Leaf Spring?

There are many advantages to leaf springs, especially when it comes to supporting a car’s wheels and axles.

Leaf springs can provide a large amount of support, which helps to keep the car stable and prevents it from wobbling or shaking.

Additionally, leaf springs are relatively inexpensive and easy to replace if they become worn or damaged. This makes them a popular choice for many car owners and enthusiasts.

Finally, leaf springs also improve the ride quality of a car by absorbing bumps and vibrations in the road. This helps to make the ride smoother and more comfortable for passengers.

What Are The Disadvantages Of Leaf Spring?

Leaf springs have been used as a form of suspension on cars and other vehicles for over a hundred years. They are relatively cheap and easy to manufacture, and they provide a good level of comfort and stability. However, they do have a few disadvantages.

Firstly, because the leaf springs are in direct contact with the ground, they can be affected by wear and tear more easily than other forms of suspension. This can lead to problems with noise and vibration, and can also shorten the life of the spring itself.

Secondly, leaf springs aren’t brilliant when it comes to suspension tuning – that is, adjusting the way they work to get the best possible performance from them. This means that it can be more difficult.

Finally, leaf springs can sag over time, which affects the vehicle’s handling and stability.

Is Leaf Spring Better Than Coil Spring or Other Competitors?

When it comes to vehicle suspension, several different spring types are used. These include leaf springs, coil springs, and torsion bars. Each one has its advantages and disadvantages.

Leaf springs have been around for a long time and were originally used in horse-drawn carriages. They’re still used today in heavy-duty vehicles such as trucks and buses because they’re much sturdier as compared to coil springs. Leaf springs are also less likely to break than coil springs. 

Coil springs are the most common type of spring used in passenger vehicles. They provide a smoother ride than leaf springs and don’t require as much maintenance. However, they’re not as durable as leaf springs.

Did you know that it’s possible to transform leaf springs into coil springs? Let’s see How To Convert Leaf Springs To Coil Springs.


Do modern cars use leaf springs?

Yes, modern cars still use leaf springs, but mostly in specific applications like heavy-duty trucks, vans, and some off-road vehicles. They are favored in these vehicles for their simplicity, durability, and high load-bearing capacity. However, in most passenger cars, coil springs or other advanced suspension systems are preferred for better ride comfort and handling.

How long can a leaf spring last?

A leaf spring can last anywhere from 100,000 to 200,000 miles, depending on the vehicle’s usage, load conditions, and maintenance. Regular inspections and proper care can extend their lifespan, but harsh conditions or heavy loads may lead to earlier replacement needs.

Do leaf springs get weak?

Yes, leaf springs can get weak over time. Factors like constant heavy loading, exposure to harsh environments, and regular wear and tear contribute to their weakening, resulting in sagging, reduced load capacity, and compromised vehicle handling. Regular inspections can help identify such issues.

Final Words

A leaf spring is a simple and effective way to support the weight of a vehicle. By distributing the weight evenly, leaf springs help to minimize stress on the suspension and axles. They also provide a relatively smooth ride by absorbing road shocks.

While leaf springs have been used for centuries, they continue to be a popular choice for many vehicles today, thanks to their durability and low cost. If you’re looking for an affordable way to improve your vehicle’s suspension, leaf springs may be the right option for you.

More resources: