The radius arm, radius rod, or torque arm is a type of suspension link that is designed to control the longitudinal wheel motion of your vehicle. In simple words, the radius arm will control the fore and aft movement of the suspension and are generally mounted ahead of the wheel to resist brake dive and wheel hop. The radius arm is connected to the axle or wheel carrier and the chassis via solid rubber bushings. The symptoms of a bad radius arm or trialing arm bushing are excessive tire wear, loose steering, and annoying clunky noises when you brake or accelerate. Keep your vehicle’s suspension in tip-top shape with Sam’s Motorsports’ affordable lineup of radius arms and radius arm brackets.