SuperPro’s vertical pivoting bushes provide a perfect example of how replacing – or upgrading - a standard rubber component with a polyurethane equivalent can provide a series of significant benefits.
Especially those found in modern-design suspension systems and specifically, the front control arms.
The VPB design means that all articulation of the suspension is achieved by the flexing of the rubber bush, which inevitably causes distortion, especially under high lateral loads as the rubber tries hard not to tear itself apart. This results in cornering forces and the condition of the road surface moving the front wheels without any driver input and consequently, a momentary misalignment of steering geometry. This can cause vague steering, increased torque-steer and uneven tyre wear.
Each SuperPro VPB is an assembly of four components: a steel encased outer bush that presses into the control arm; a steel tube that fits tightly into the centre of the bush, leaving a chamfered gap at each end to allow movement; and two polyurethane cones that fit neatly over the ends of the extended inner tube. This unique assembly allows the control arm to pivot in the vertical plane with minimal resistance, whist retain positive location in the horizontal plane.
This ensures that all steering loads and suspension movements are directed to the wheels. The positively located joint means the suspension geometry remains consistent and consequently, this provides excellent feedback and feel through the steering, reduced torquesteer and even tyre wear. And, because a SuperPro equipped arm will pivot freely without the material needing to flex to achieve movement - plus, with the long-lasting properties of SuperPro’s unique blend of polyurethane - a high level of performance can sustained for most of the vehicle’s life.
Click this image to view the full-size VPB Bulletin.