Have you ever tried to pull or push a heavy object over a surface? You would have experienced a force that acted as a hindrance to moving the object. This force is the force of resistance. Any object under motion experiences a negative force of resistance. The same happens when your vehicle tyres start to rotate. As the tyres rotate on the road, the outer surface of the tyre and the road surface come in contact. The rotation of the tyres is opposed by a negative force exerted by the surface of the road. This force is known as rolling resistance.
Rolling resistance & need
Rolling resistance is essential for the vehicle under motion as it is this resistance that helps the tyre to maintain a grip on the surface of the road. The traction and the grip which is needed for the vehicle to avoid skidding are provided by this negative rolling resistance. On the other hand, if this rolling resistance increases it shall become impossible for the vehicle to move due to high negative force. For the vehicle to remain in motion, the vehicle needs the energy to overcome this rolling resistance.
The vehicle needs external energy to overcome this force of resistance and this energy comes from the vehicle engine. The engine of the car produces energy by burning fuel. Thus, it can be said that if the tyres of the vehicle experience high rolling resistance then, high energy shall be required which shall, in turn, lead to high consumption of the fuel.
The challenge & Solutions
To reduce the fuel consumption by the vehicle to some amount the possibility lies in reducing the rolling resistance experienced by the tyres. But decreasing rolling resistance may decrease the grip and the traction needed to hold and control the vehicle. Thus, one can have either a tyre with low rolling resistance with reduced gripping mechanisms or tyres with increased grip and control and high rolling resistance. Over the years, we had such tyres, but with advanced materials and technological innovation, today companies like Continental, Goodyear, and Pirelli are known to come up with tyres that not only reduce the rolling resistances experienced by the tyres but also help in enhancing the grip of the tyres on the road surfaces.
These newly innovated car tyres, make use of a technology known as an active brake mechanism which helps in increasing the tread surface area when the brakes are applied. Due to this ability, the tyres can stop at shorter distances especially on wet roads giving enhanced control of the vehicle. The specially designed tread patterns help in reducing the rolling resistance. Thus, these tyres not only reduce the rolling resistance but also help in better grip and control handling of the vehicle.
Continental tyres make use of a new material known as green chilli which helps the tyres to adapt to various road surfaces. The tyres have silica and the synthetic and natural rubber mixture which reduces tyre wear and reduces rolling resistance. Some examples are Goodyear efficient grip performance tyres, Continental Eco Contact 6 tyres, and Pirelli p7 Blue. These tyre manufacturing companies make use of the special compound for tyre manufacturing that helps in enhancing the grip, lowering the rolling resistance, and reducing the amount of heat which is generated between the tyres and road surface.
One can find the Winrun tyres performance and category details through tyre labels. Each tyre has a label known as the EU label which is used to grade the tyres based on the fuel efficiency, wet grip, and the tyre noises. The grading is in the form of alphabets ranging from A to G. Grade A signifies that the tyre is best in its category and G specifies that the tyre is worst in that category. Generally, tyres grades may vary due to the purpose of their manufacture. For example, an eco-friendly tyre may get a different grade in terms of fuel efficiency when compared to a high-performance tyre or a tyre specifically designed for grip enhancement.
Next time when you visit a nearby garage for purchasing a tyre, look at these EU labels to understand the type of the tyre. Remember a tyre which lowers rolling-resistance, enhances fuel efficiency and increases wet grip would have an EU label with 2 A’s.