Welcome to Hoosier Direct -- Road Racing Tires! We are your best source for Hoosier Sports Car Road Racing tires. Hoosier makes America's #1 road racing and track-day tires for your sports car and open-cockpit road racer. Hoosier Direct delivers the most value to our customers by providing industry-leading service, valuable technical and product information, and the best road-racing tires and products at the lowest prices available.  Hoosier Direct is part of the Competition Motorsport Group, which allows us to maintain the largest inventories of factory-fresh Hoosier Road Racing Tires in stock for same- or next-day shipping. Feel free to spend some time here, reviewing the available road racing tire information and news, reference resources, our customer gallery, etc.  Our Hoosier Direct site was developed to support road racers and track-day participants making decisions about which tires are right for you. Hoosier Direct was established by Competition Motorsport Group FOR track and race enthusiasts BY track and race enthusiasts.  

that we use ourselves.  If we don't use it at the track, we won't sell it, period.  has all of our current road racing tire specials and everyday low track-day tire prices.  You'll be glad that you chose Competition Motorsport Group to be your racing and track tire supplier. History of Hoosier Racing Tire Hoosier Racing Tire has been producing the highest quality race slicks and track tires for more than 50 years.  Hoosier is the largest race tire manufacturer in the world, and all Hoosier race tires are still proudly made in the USA!  Hoosier Racing Tire produces over 1,000 different types of race tires. The company has its own 300-mph tire test wheel, a racing tire technology testing center, and state-of-the-art, fully-integrated racing tire production facilities. Hoosier R7: Hoosier Racing Tire Sports Car D.O.T. R7 Radials (“R7s”) are Track and Competition DOT tires developed for performance and race drivers who compete in driving events where responsiveness and high levels of race tire grip in dry conditions is desirable.

The R7 track tires are designed to provide faster, more consistent lap times and extended tire longevity due to the improved tire traction and handling.  The R7 track tire features a revised symmetric internal construction that uses nylon cord radial carcass plies reinforced by two lightweight steel belts and a spirally wrapped circumferential nylon cap ply under the R7 track tread. Hoosier Racing Tire's extensive R7 testing has shown that the R7 produces crisper steering response and improved transitional track performance. The Hoosier R7's internal construction provides increased overall grip and greater stability at the tire's higher limits of adhesion, allowing the driver to apply more power with confidence. The new R7 track tire has also shown better overall wear due to its improved tread profile. Additionally, the R7's symmetric tread design allows the R7 to be mounted on either side of the car (and later can be remounted inside out to further extend tread life).  Beginning with a tread depth of 4.5/32", the R7 will not require shaving for competition.

Hoosier A7 Hoosier Racing Tire A7 radials are very similar to the R7 model, but the A7 is designed to be used in cooler temperatures as the optimal operating temperature of the A7 tread compound is lower.  This makes the A7 the first choice for use on autocross circuits where the track is shorter, speeds are lower, and you have less time to get your tires up to temperature.  Volvo Prime Mover For Sale MalaysiaThe A7 racing tire is not designed for high temperature environments, which would lead to accelerated tread wear and dramatically shorten the life span of the A7 tire.Rv Kitchen Faucet Brushed Nickel Hoosier’s Radial Wet H20 race tires have a symmetric internal construction and directional tread design that allow them to be mounted for use on either side of the race car. Property For Sale In Tanuku

The Hoosier H2O racing tire’s internal structure features a three-ply nylon cord radial casing reinforced by two fiberglass belts and a spirally wound circumferential nylon cap ply under the racing tread. Non-DOT approved Hoosier racing rain tire.  Deep groves combined with a soft compound result in maximum race tire traction when there is standing water on the race course. Consistent standing water is required to maintain optimal operating temperatures.  Without standing water, these Hoosier racing tires will blister, chunk, and perform poorly as they will overheat. D.O.T. labeled Hoosier Racing Tires meet Department of Transportation requirements for marking and performance only and are NOT INTENDED FOR HIGHWAY USE. It is unsafe to operate any Hoosier Racing Tire, including D.O.T. tires, on public roads. The prohibited use of Hoosier Racing Tires on public roadways may result in loss of traction, unexpected loss of vehicle control, or sudden loss of racing tire pressure, resulting in a vehicle crash and possible injury or death.  

And like all Hoosier race tires and track tires, R6 racing tires, A6 racing tires, H20 racing tires, road racing slicks, and vintage/historic racing tires are not intended to be driven in near-freezing temperatures, through snow, or on ice.  It is also essential that these racing tires be stored indoors at temperatures above 32 degrees fahrenheit.Like most things in Sprint Car Racing, Sprint Car Tires are unique. Take a quick look at a Sprint Car and it may look as though one rear tire is bigger than the other, that’s probably because it is! This is known as Stagger, we’ll talk more about this later.Sprint Cars use very large right rear tires, in fact an average right rear tire is around 21 inches (53.3 cm) wide, has a circumference of 105 inches (266.7 cm) and a 33.2 inch (84.3 cm) diameter on a 15 inch (38.1 cm) diameter wheel. Another thing you may notice about Sprint Car Tires is that the rear tires sometimes look flat; this is not a mistake by the pit crew! Sprint Cars use very low tirepressures in the rear tires, sometimes as low as 4 PSI in the left rear and 6 PSI in the right rear.

These lowpressures increase the amount of tire that is in contact with the track surface, in turn increasing the grip. If the track is very tacky or hooky higherpressures are needed, if the track is dry or slick lowerpressures are required. The front tires of a Sprint Car are usually inflated to around 10-12 PSI.Sprint Car Tires are designed with very soft sidewalls, this allows the tire to “distort” during cornering, creating a larger contact area with the track surface. This once again increases the contact area creating more bite. As mentioned earlier Sprint Cars use stagger, meaning that the left rear tire is smaller than the right rear tire. Why do they use stagger? Well the best way to explain this is to think about your road car, it has a differential that allows the rear wheels to rotate at different speeds when cornering. If you turn left, the right wheel will turn faster than the left wheel and vice versa, without this your car would not corner very well. Sprint Cars have a once-piece rear axle connecting the left and right wheels and do not have differentials, therefore if the rear tires were the same size, the driver would probably end up in the fence!

The amount of stagger used varies from around 11-20 inches (27.94-50.8 cm), depending on track conditions. On a tacky or hooky track more stagger is required, on a dry or slick track less stagger is needed. Other considerations for the amount of stagger is the size of the track, a small track will require more stagger than a large track. The banking of a track is also another factor that should be considered, high banked tracks will require more stagger than flat tracks.If you take a walk through the pits at a Sprint Car show you’ll see the crews busily measuring a car’s stagger by running a tape measure around the center of the rear tires to measure their circumference, the difference between the two tires is the amount of stagger. Another thing you will notice while you are in the pits is the sound of air wrenches whirring away, this is the crews removing the wheel’s bead locks so that they can fit tires of different circumference to achieve the correct amount of stagger. This is often done at the last minute after assessing the condition of the race track.

Due to the very low air pressures used and rough conditions of some tracks, Sprint Cars use Bead Locks to ensure the tires stay on the wheels. Bead Locks are simply a ring that is bolted to the outside of the wheel locking the tires into place. Without these the tires would easily peel off of the wheels. Sprint Cars use devices called Bleeder Valves to regulate the air pressure in the tires. As a Sprint Car Tire heats up, so does the air in the tire, this increases the air pressure in the tire. This can be a major problem in a feature race, where the heat built up over many laps can more than triple the air pressure in the tire, dramatically affecting the setup of the car. Bleeder Valves are inserted into the wheel and are set to the required pressure, once the tire reaches that pressure the Bleeder Valve releases the excess air, ensuring the tire maintains the optimum pressure. There are several different styles of bleeder valves however they all serve the same purpose.

Several compounds of Sprint Car Tires are available, from very soft to hard, although compared to pavement racing, even the hard compound tires would be considered soft. One of the major Sprint Car Tire manufacturers is Hoosier Racing Tires, their softest tire is the D10 with the compound increasing to "Hard". Compound choice is critical, if you go too soft you may literally tear the tire apart or worst still wear it down until it goes bang! On the other hand, if a tire is too hard for the track conditions, the car may not have enough grip and the driver will find himself heading backwards in the pack. The tread pattern of Sprint Car Tires varies between manufacturers, most comprising large blockpatterns. The most important part of the tread pattern is the edges of the block, good sharp edges provide forward and side bite. As the tread blocks make contact with the track surface they move, generating heat. If you ever get the chance to feel a Sprint Car’s tire after a feature race you will find that it will be very warm to extremely hot.

Some manufacturers have placed holes in the middle of the tire’s tread blocks called “heat dispersion vents” which help to dissipate this heat build up which can cause blistering. Front tires tend to have an “S” pattern as they do not require forward bite. Another way to dissipate heat and improve a Sprint Car Tire's grip is by grooving the tires. Tires are grooved with special tools which heat up and slice their way through the tire’s tread. Large tread blocks can be grooved into smaller blocks, the more blocks the better the cooling efficiency of the tire as well as creating more edges for the tire to grip on. More tread blocks also assist with “tread cleaning”, meaning that any dirt that may build up on the tire is channeled out. Tread blocks should not be grooved too small or they will tend to tear from the tire. Grooves can be made horizontally and vertically across the block as well as diagonally. Diagonal grooves will give both forward and sideways bite. Siping means to cut the Sprint Car Tire's blocks with a razor blade.