Single-sided swing arms, also known as single-sided swingarms or SSSAs, offer several advantages in terms of aesthetics, functionality, and maintenance. However, there are a few reasons why they are not as commonly found on motorcycles:
Cost: Single-sided swing arms tend to be more expensive to manufacture than traditional double-sided swing arms. The design requires additional engineering and machining processes to ensure structural integrity and proper alignment. As a result, motorcycles equipped with single-sided swing arms often come with a higher price tag.
Complexity: Single-sided swing arms introduce additional complexity to the motorcycle's design. They require a specific hub and wheel arrangement, often involving a more intricate axle system. This complexity can make the design and assembly process more challenging, leading to increased manufacturing costs and potential maintenance difficulties.
Weight: Single-sided swing arms typically weigh more than their double-sided counterparts. The additional weight can impact the motorcycle's overall performance, especially in terms of agility and handling. Manufacturers often prioritize weight reduction to enhance maneuverability and responsiveness, which can lead them to choose lighter double-sided swing arms.
Compatibility: Single-sided swing arms may not be compatible with certain suspension setups, such as certain types of shocks or linkage systems. Some motorcycles may require a specific arrangement or clearance that is better accommodated by a double-sided swing arm. Additionally, certain riding styles or disciplines, such as off-road or sport-oriented motorcycles, may benefit from the additional strength and stability provided by a double-sided swing arm.
Tradition and Design Preference: Motorcycles have a long history of utilizing double-sided swing arms, and many riders and manufacturers appreciate the classic aesthetics associated with this design. Double-sided swing arms are more prevalent in the market, and manufacturers often stick to traditional designs that are familiar to customers.
While single-sided swing arms are less common, they are still found on various motorcycles, especially those produced by certain manufacturers like Ducati. These swing arms offer advantages such as easier rear-wheel removal, improved tire access, and enhanced visual appeal. However, the decision to use a single-sided swing arm ultimately depends on the specific goals, budget, and engineering considerations of each motorcycle manufacturer.