11/06/2024
7:07 AM
Competition tires are a subcategory of race tires designed for tuned and racing cars. They can only reach their full potential on a special racing track with a perfectly flat paved surface. Many models are not suitable for average daily driving.
At first glance, these tires appear to be very worn out — their tread looks "bald". In fact, competition tires come like this when new. On asphalt that is flat, smooth and dry, they far outperform standard tires in terms of handling and grip.
Competition tires are engineered to provide safety for racers and maximum grip for cars travelling at very high speeds. They have the highest speed ratings possible — W (up to 168 mph) or Y (up to 186 mph). To deal with these kinds of speeds, their design differs from other types of tires. But to understand exactly what makes them so special, we need to take a closer look at how they are made.
Slicks have no drainage grooves on the surface of the tread (except for rain slicks) and so do not evacuate water from the contact patch. The shallower the tread pattern, the harder it is to drain water off. For this reason, slicks can only be used to drive in dry weather conditions (again, apart from rain slicks). This is similar to why you will see F1 racers pulling in for a pit stop to change tires if it starts to rain.
By contrast, semi-slicks have grooves so you can use them on wet roads with a lower risk of aquaplaning. We will discuss both kinds of competition rubber in more detail below.
World-famous manufacturers develop special technologies to improve tire performance so that they provide maximum grip, superior handling when maneuvering and do not wear out too quickly.
For example, for its Hankook Ventus V12 EVO2 tires, manufacturer Hankook uses a special high grip silica tread compound featuring an innovative functionalized styrene polymer.
In the carcass of competition tires, the tire cord features special metal threads which ensure that the soft rubber keeps its shape under increased load.
The low profile of racing tires is designed not for beauty but to cope with the inertial force that occurs when changing direction abruptly. This force multiplies as speed increases. The low profile of a competition tire helps it handle these stronger forces that it is subjected to at high speeds.
As mentioned above, automotive competition rubber is divided into two main categories: slicks and semi-slicks. Let's take a closer look at the key characteristics of each separately.
The tread of slicks gives the maximum contact patch area and hence the maximum grip on asphalt surfaces. One example is the Michelin Competition GT. Such rubber is used in professional racing competitions on special race tracks such as DTM, Formula1, and other races with highly-trained drivers. It is not permitted to use slick tires on normal public roads. You definitely can't go off-road on drag slicks.
The service life of slick tires depends on many factors, but they generally have a lower treadwear due to the special composition of the rubber compound. Slicks tend to cost more than semi-slicks.
While generally slicks are designed for dry weather, there are special kinds of slicks designed for wet roads. These tires have drainage grooves which evacuate water from the contact patch to the sides. A good example of this kind of tire is the rain slick Hankook Ventus Z207 / Z217, which is a rain tire for circuit racing exclusively on wet roads. The tire is engineered to effectively reduce the risk of aquaplaning and has excellent directional stability.
In the end, slicks are really for professional racing and not suitable — indeed illegal — for common use. But if you are a professional race driver looking for used tires or a motorsport fan you can read more about slicks in the Racing Tires category.
Semi-slicks are good for car races, mountain races and amateur rallies. Unlike slicks, semi-slicks can legally be driven on public roads - but it is still generally undesirable to do so as they are really intended for racing. Semi-slicks are more responsive than racing slicks and better at cornering. Their advantages also include improved vehicle dynamics, a more comfortable ride, and good directional stability of the car at speed.
The composition of rubber in semi-slick tires differs significantly from that used in standard tires. These tires must provide good contact with the road surface and not burn when the driver suddenly steps on the gas.
To adjust the stiffness of the wheel, manufacturers adjust the compound mixture. For softer tires, more silicone is used. This allows the tire to stick to the asphalt, giving good grip even in the rain. However, the disadvantage of soft rubber is lower wear resistance.
It is up to the driver to choose the right degree of hardness according to the conditions of the upcoming race. For racing on mountain roads, soft rubber is a good choice as it quickly warms up in such conditions, providing a grip advantage literally only meters after the car starts to move.
For normal conditions, medium-hard (or hard) rubber is a solid choice as it is very hardy and well suited for long difficult races.
Several factors affect the treadwear of semi-slick tires, including rubber hardness, road conditions, driving style, ambient temperature, and the weight and power of the car. The treadwear index of a semi-slick is usually in the range of 80 — 140 units. Tire pressure should be set according to the tire manufacturer's recommendation as deviating from this can significantly reduce the tire’s service life. A wear indicator is located on the tread or sidewall of the semi-slick tire.
Here are the top 3 competition tires as recommended by Utires.com experts.
A recent entrant to the market has been rigorously tested on a variety of racing tracks. The tire is very responsive for steering and resists side load well at high speeds.
Japanese semi-slicks with an asymmetrical pattern. Thanks to the wide shoulder area, these tires perform particularly well on dry surfaces. According to the manufacturer, these tires also deliver excellent results on wet asphalt. While not recommended, they can be used on public roads too.
These tires are designed for dry racing tracks with Ferrari, Lamborghini, Porsche, or BMW cars. The tire offers precise steering response, even under extreme loads, and excellent dry grip. They are approved for road use but not suitable for driving on a wet track.
You can check out all these tires as well as many other models of used competition tires on Utires.com tire rack. We offer a wide choice of tires from the best brands such as Hoosier, Nitto, Michelin, Pirelli and many others, all available with a warranty at reasonable prices.
To find the perfect tire for your needs, use the indicators on the bar on the left to select your ideal tread depth as well as the tire size, price, brand and model you are looking for.
Because it drastically reduces grip with the road and vehicle handling. Operating a car equipped with new or used competition tires becomes dangerous off the racing track: it really slides, especially in wet conditions.
Definitely. Shop for them at renowned offline or online retailers. Choose the kind you are looking for and don’t forget to check for promotions and even better discounts. At Utires.com prices for used competition tires start from $47. For this price you can buy one Pirelli Scorpion Verde NO with 8/32” tread left.
Yes and no. Even if competition tires have surpassed all Department of Transportation (DOT) requirements, the vehicle equipped with them cannot be driven on paved roads and highways. It is highly unsafe.
This is one FAQ you will find in racing forums. Racers argue over the advantages of driving on competition tires. Some claim that for amateur road racing there is not much difference between competition tires and tire categories such as extreme performance, max performance, or even ultra high performance tires, and that competition tires only win you fractions of a second.
Having said that, sometimes mere fractions of a second are all that separates a winner from the first-place loser… What do you think, are competition tires the right choice for amateur racing? We’d love to hear more about your experiences in the comments.