Continuous movement on the road is not easy and it takes a lot of hard work and mechanism for a car to do so. Its four tires are supported by the suspension system which takes care of the pits and jerks on the road. You can not imagine driving a car without a suspension system. Due to this system your vehicle gives a smooth feel. And suspension bushes are an integral part of the suspension system.
Although there is no need of suspension system on a perfectly flat road but unfortunately there are no such road. They are far from flat and sometimes you can see even fresh highways having pits that can interact with the tires of your car. These imperfections of the road apply forces to the wheels of your car which is bad for its health and to avoid this suspension bushes have been utilized. They control the abnormal friction between the road and your car and act as noise and friction absorbers.
In fact, the car suspension system maximizes the normal friction between the 4 tires of your car and the road surface. It provides steering stability with good handling and ensures your comfort which is one of the major functions of the suspension bushes. These parts are fitted to your car at all those points where the chassis is joined to a moving suspension component. They act like a noise and vibration absorbing barrier between the road and the car and this is due to them that your car’s speed is maintained for a long period. These days’ polyurethane has been used for making these parts because the material is a combination of high tensile strength and elasticity that provides immense durability in the toughest conditions.
The resilience of polyurethane helps in springing back of suspension bushes to the original shape easily to absorb shock and prevent dirt ingress and wear. And due to these auto-mechanics and car-experts advise to use poly suspension bushes always.