A looped middle link, commonly known as a "single-sided swingarm," is a design feature found in certain motorcycles where the rear suspension and wheel are connected to the bike using a single, centrally located arm. This design differs from the traditional dual-sided swingarm found on most motorcycles.
The primary effect of a looped middle link or single-sided swingarm is aesthetic. It gives the motorcycle a unique and distinctive look, often associated with high-end or sporty models. The exposed rear wheel, with its lack of clutter from the second swingarm, can create a sleek and futuristic appearance.
From a functional standpoint, a looped middle link can offer several advantages:
Ease of wheel removal: With a single-sided swingarm, the rear wheel can be removed quickly and easily for tire changes or maintenance. This is because the wheel is attached on one side only, allowing for straightforward access.
Showcasing the rear wheel: The single-sided swingarm design allows for a clear view of the rear wheel, which is often designed to be visually appealing. This can be desirable for motorcycles with intricate wheel designs or to showcase features like a single-sided rear brake or a distinctive sprocket.
Weight reduction: In some cases, a looped middle link can result in weight reduction compared to a dual-sided swingarm. This can contribute to improved handling and overall performance, especially in sport-oriented motorcycles.
Increased stiffness: The single-sided swingarm design can offer increased rigidity and stiffness compared to a dual-sided swingarm. This can enhance the bike's stability and responsiveness during cornering and acceleration.
It's important to note that not all motorcycles utilize a looped middle link, and the design considerations and effects can vary depending on the specific bike and its intended purpose. Ultimately, the choice of swingarm design is influenced by a combination of functional and aesthetic factors.