Endurance racing (motorsport) these classes continued to embrace the endurance format. Multiple drivers per car was an early adaptation as the rigors of endurance racing quickly overcome the abilities of most racing drivers to compete solo, although solo attempts on 24 hour races like Le Mans would continue into the 1950s. The various endurance formats were appealing to manufacturers, not only as alternatives to the expense of Grand Prix racing, but also because of its increased relevance to road going models. In automobile endurance racing, three events have come to form a Triple Crown. They are considered three of the most challenging endurance
ChampCar Endurance Series ChampCar Endurance Series In 2017, ChumpCar World Series (ChumpCar International Inc.) adopted the name ChampCar Endurance Series and filed for trademark rights after receiving the blessings from the IRL to use the name. A registered trademark was granted by the USPTO on August 28, 2018. ChumpCar World Series, a budget class endurance racing organization known as ChumpCar International Inc., was founded in 2009. Chumpcar was a play on words named after the defunct Champ Car World Series. The initial concept was an endurance racing series for cars of $500 in value or less similar to the 24 Hours of LeMons