04/26/2025
Double Wishbone Suspension Explained: Key Parts & How They Work:
The double wishbone suspension is a popular suspension setup in many performance and passenger vehicles due to its superior handling and control. It consists of multiple components that work together to ensure a smooth ride and optimal wheel alignment. Here's a breakdown of its key parts:
1. Upper Arm:
Also called the upper control arm, it is shaped like a wishbone or “A” and connects the top of the wheel knuckle to the vehicle frame. It helps control the vertical motion of the suspension and maintains proper wheel alignment during suspension travel.
2. Lower Arm:
Located below the upper arm, this component also connects the wheel knuckle to the frame. It bears a larger load and works in tandem with the upper arm to keep the wheel steady and aligned.
3. Knuckle:
The knuckle is the central component that connects the upper and lower arms, wheel hub, and the steering system. It allows the wheel to pivot and turn while also supporting the weight of the vehicle.
4. Damper (Shock Absorber):
The damper controls the rebound and compression of the suspension, reducing vibrations and absorbing road shocks to enhance ride comfort.
5. Damper Spring (Coil Spring):
It supports the vehicle’s weight and absorbs bumps, working alongside the damper to ensure a smoother ride.
6. Damper Fork:
This component connects the lower part of the damper to the lower arm, helping transmit forces between them effectively.
7. Driveshaft Boot:
A flexible rubber cover that protects the CV (constant velocity) joint on the driveshaft from dirt, moisture, and debris, ensuring smooth power delivery to the wheels.
8. Stabilizer Bar (Anti-Roll Bar):
A bar that links both sides of the suspension to reduce body roll during cornering, improving stability and handling.
9. Stabilizer Bar Bushing:
Rubber or polyurethane bushings that cushion the stabilizer bar, reducing noise and wear while allowing limited movement.
10. Radius Rod:
A supporting link that helps control longitudinal movement (front-to-back motion) of the suspension components.
11. Radius Rod Rubber Bushing:
A flexible mount that dampens vibrations and provides slight movement while supporting the radius rod.