The building of new racetracks outside Chicago and Kansas City, Kan.
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After the phone company Nextel announced it would succeed R. By the end of the first decade of the 21st century, Jimmie Johnson had emerged as the dominant driver in the Cup Series; in he became the first driver to win four consecutive series championships.
In addition to overseeing the Cup Series, NASCAR sanctions two major national series: the Nationwide Series founded in and called the Busch Series — , in which race cars that differ somewhat in engine and body size from Cup cars are used, and the Camping World Truck Series founded as the Super Truck Series in and called the Craftsman Truck Series — , in which race cars with bodies that mimic pickup trucks are used. You are using an outdated browser.
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Innovation of a race car
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Stock car racing
Facts Matter. Start Your Free Trial Today. Learn More in these related Britannica articles:. Serious injuries, though, are relatively rare nowadays. Safety is a moving target, and tragedies from the past have served to make the sport's governing body vigilant in instituting further advances and reforms.
The "stock" in stock car racing was not always a misnomer. The current model is known as "Generation 6," or "Gen Generation 2 : Stock body with modified frame. Modified chassis becomes part of the sport.
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Generation 3 : Wheelbase reduced to inches. Body panels still purchased from manufacturers. Generation 4 : Highly modified body. Bumpers, noses and tails composed of molded fiberglass. Double frame rail on the driver's side with steel plates covering the door bars to help prevent intrusion on contact. Energy-absorbing material installed between the roll-cage door bars and panels to attenuate energy upon impact.
The simple seatbelts of the s, '50s and '60s have given way to sophisticated devices that offer protection that has been rigorously tested. Modern rules require a seven-point restraint system and recommends a nine-point design.
Each belt includes, at minimum, two lap belts, two shoulder belts, two anti-submarine belts and one "negative-G" belt, all meeting at a single latching mechanism. Advanced window nets and laminate windshields present intrusion of foreign objects into the cockpit. The seatbelt is placed over the HANS device to keep it close to the body.
These New Rules Changed NASCAR Forever – SportsBreak
The s were a grisly period in American motorsports in general. The dual menaces were tires incapable of withstanding higher speeds and fires that resulted from ruptured fuel tanks. Goodyear Tire and Rubber developed an inner liner to prevent catastrophic tire failure.
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Two decades later, radials replaced bias-ply tires and enhanced reliability. Competition between tire manufacturers once hindered safety efforts by creating competition for speed between companies. The Firestone Racesafe Fuel Cell Bladder was introduced in , largely putting an end to the frightening threat of raging gasoline fires.
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What was considered lightning quick in the s — changing four tires and adding fuel in about 25 seconds — is now just over 40 percent of what was then crucial. Until , however, no speed limits were in place on pit road. Since the death of a crewman in a pit-road crash in , NASCAR has mandated different speed limits based on the conditions of each track.
Related history of stock car design changes
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