Radius Rod 5/8in Alum 18-1/2in Black

The Radius Rod 5/8in Alum 18-1/2in Black by ALLSTAR PERFORMANCE is a precision suspension control arm designed for street rods, hot rods, and custom-built vehicles where traditional geometry has been modified or aftermarket chassis components are in use. Radius rods serve as critical locating members that control lateral axle movement and maintain chassis alignment under acceleration, braking, and cornering forces. Whether you're building a classic car with modern running gear or fabricating a custom independent rear suspension, this aluminum radius rod provides the adjustability and durability needed to dial in suspension geometry without the weight penalty of steel alternatives.

Constructed from lightweight aluminum, the radius rod measures 18-1/2 inches in length with a 5/8-inch diameter tube, offering a balance between structural rigidity and minimal unsprung weight that improves handling response and reduces brake dive. The black powder-coat finish resists corrosion and UV damage, maintaining appearance through seasons of use. The 5/8-inch tube diameter is a popular specification in the custom car world, compatible with standard rod-end bearing sizes and spherical joints commonly available through suspension suppliers. At just 0.8 lbs, this aluminum construction significantly reduces rotational mass compared to steel equivalents, benefiting acceleration and fuel efficiency in lighter vehicles.

Mechanics and fabricators favor ALLSTAR PERFORMANCE radius rods for bolt-on and custom-built suspension systems, including independent rear suspensions, four-link setups, and adjustable trailing arm configurations. Installation requires welding or bracketing to the frame and axle housing, with rod-end bearings (sold separately) threaded into each end for articulation. The 18-1/2-inch length suits mid-wheelbase vehicles and makes this rod suitable for both driver-side and passenger-side applications in many hot rod and street rod platforms. Verify frame and axle geometry before purchasing to ensure proper suspension alignment and load distribution.