Swingarm

What Is a Motorcycle Swingarm?

The swingarm is one of the most fundamental components in a motorcycle's rear suspension system. A single- or double-sided mechanical device, it connects the motorcycle's chassis to its rear wheel, allowing the wheel to pivot vertically in response to road conditions while keeping the axle firmly in place. Without a properly functioning swingarm, a bike would transmit every bump, pothole, and undulation directly to the rider — and rear wheel traction, tracking, and handling would all suffer dramatically.

Mounted to the frame via a pivot bolt at the front end, the swingarm rotates up and down as the rear suspension compresses and rebounds. This motion is controlled by the shock absorber, which is connected between the swingarm and the upper frame, ensuring consistent tire contact with the road surface and improving both traction and rider control. The design also absorbs forces from acceleration, braking, and chain pull, making it an active participant in how a motorcycle handles at every speed.

Types of Swingarms & Related Components

Swingarms come in several configurations depending on the motorcycle's application:

• Double-sided (swinging fork): The classic twin-arm layout, common on cruisers, tourers, and off-road bikes, with a pair of arms cradling the rear axle on both sides.
• Single-sided: Found on sport bikes and some customs, offering easier rear wheel removal and a distinctive visual profile.
• Cantilever: A triangulated frame design that transfers swingarm movement to compress one or more shock absorbers, typically mounted forward of the swingarm.

Beyond replacement swingarms themselves, the category also includes retrofit and conversion kits that allow riders to upgrade older frames with improved pivot hardware, and swingarm covers and pivot caps that protect pivot points from contamination while adding a custom finishing touch to the rear suspension area.

Why Your Swingarm Matters

Worn swingarm pivot bushings or bearings are a common cause of vague handling, rear-end wander, and unpredictable tracking — problems that riders often mistake for tire or shock issues. Upgrading to spherical bearings at the swingarm pivot can dramatically reduce stiction, improve compliance over rough surfaces, and restore crisp, responsive handling to bikes that have developed slop in the rear end over the years. Keeping swingarm pivot covers in good shape also prevents road grit and moisture from accelerating wear on internal bearing surfaces.

Top Swingarm Brands

Custom Cycle Engineering is a go-to name for Harley-Davidson enthusiasts looking to upgrade their rear suspension dynamics. Their swingarm retrofit kits are engineered specifically for Touring and FXR models, replacing stock pivot bushings with precision spherical bearings that significantly improve handling and rear-end tracking.

Figurati Designs bridges the gap between function and custom style with their patented swingarm pivot covers, crafted from 316L marine-grade stainless steel and hand-painted to a jewelry-grade finish. Designed to fit Harley-Davidson Touring models and Trikes, they protect pivot points from contamination while transforming a purely utilitarian area into a personalized showpiece.

Alloy Art is well regarded in the V-twin and custom motorcycle community for precision-machined suspension and chassis components. Their swingarm offerings reflect a commitment to tight tolerances and quality materials suited for performance and custom builds alike.

Moose Racing brings its deep off-road pedigree to the swingarm category, offering components built to handle the rigors of motocross, enduro, and trail riding where rear suspension durability is tested by the most demanding conditions on earth.