Types Of Tyre

There are various types of tires designed for specific purposes, such as all-season tires for everyday use, winter tires for icy conditions, and off-road tires for rugged terrain. Performance tires enhance handling and speed, while run-flat tires continue to function even after a puncture. The various types of tyres are:

Asymmetric Tyres

Asymmetric tyres have different tread patterns on the inner and outer edges of the tread to improve performance. On the outside edge, the large hard tread blocks help with cornering. On the inside edges, smaller tread blocks are designed to move water and improve wet grip. There is often a continuous rib in the middle of the walk to help with straight-line stability. The words ‘inside’ and ‘outside’ on the tyre sidewall indicate which side the tyre should be mounted on.

Directional Tyres

Directional tyres are designed to rotate only in one direction, indicated by an arrow on the tyre sidewall. These tyres are better at dispersing the water that gets accumulated in the front of the tyre. They also reduce road noise and improve directional stability.

 

Directional Tyres

Directional tyres are designed to rotate only in one direction, indicated by an arrow on the tyre sidewall. These tyres are better at dispersing the water that gets accumulated in the front of the tyre. They also reduce road noise and improve directional stability.

 

Winter Tyres

These types of tyres are called mud and snow (M&S or M+S) tyres. They are used in all seasons. Their design provides better traction on snow and ice than summer tyres of the same vehicle. Winter tyres are designed to fit and run well on icy surfaces during the winter season. At temperatures below 7 °C, the rubber in normal tyres begins to harden, reducing grip on cold, wet roads, snow, and ice.

In contrast, winter tyres remain soft and flexible at low temperatures. They maintain grip, and with the help of several special grooves in the tread called sips, they provide superior braking, handling, and traction in all winter driving conditions. A typical summer tyre might have around 200 sips, compared to a winter tyre with about 1500. Winter tyres can provide up to 60% better grip in cold conditions and reduce braking distance by up to six full car lengths. It can make a big difference in terms of road safety.

All-Season Tyres

All-season tyres have high silica contents for low-temperature flexibility & a tread pattern somewhere between that of a normal summer tyre & a winter tyre. They can also be used as an alternative to winter tyres. They are rarely as good as specialist tyres but perform better than summer tyres on winter roads and avoid the hassle and cost of swapping wheels and tyres twice a year.

Part Worn Tyres

When changing tyres, the safest option is to opt for new tyres. Part-wear tyres can be fitted but must meet various criteria. The Motor Vehicle Tyres Safety Regulation 1994 has laid down minimum safety standards for the supply of part-wear tyres. Under regulations, part-worn tyres, except retreads, must have an EC approval mark and a speed and load capacity index moulded into the sidewalls at the time of manufacture. In addition, all types of part-worn tyres must be marked ‘part-worn in capital letters at least 4 mm high.

 

Run-Flat Tyres

Run-flat tyres feature unconventional designs that enable them to operate safely at limited speeds, even without air pressure. They have robust load-supporting sidewalls or employ support structures fixed to the rim inside the pneumatic tyre, ensuring load-bearing capabilities in the event of deflation. However, a drawback is that many run-flat tyres are unrepairable when punctured. Some brands offer provisions for repairing run-flat tyres, while others mandate a complete replacement. These unique features, embedded in the rubber, contribute significantly to tyre performance and are a key factor in classifying tyre types.

 

Eco-Friendly Tyres

In line with the growing environmental awareness and pressure to reduce carbon footprints, vehicles are not the only aspect adapting to eco-friendliness. Tyres themselves have evolved to become more environmentally responsible. These eco-friendly tyres primarily focus on lowering fuel consumption through minimal rolling resistance, which decreases friction losses in the tyre compound. Presently, eco-friendly tyres incorporate silica into their compounds, enabling tyre manufacturers to create low rolling resistance tyres with sufficient grip. Manufacturers have also dedicated efforts to optimise tyre design, contour, compound, and tread patterns, revolutionizing all four aspects of tyre construction to achieve a balance between fuel efficiency and excellent traction. Notably, in India, annual fuel expenses far surpass tyre spending, making the savings from eco-friendly tyre choices a worthwhile investment.