Hot Wheels Redlines are a line of die-cast toy cars produced by Mattel from 1968 to 1977. The name “Redlines” comes from the red stripe on the tires of the original models.

The concept for Hot Wheels originated in the late 1960s, when Mattel realized there was a market for toy cars that were more realistic and detailed than the competition. Hot Wheels were designed to be fast and sleek, with bright colors and intricate details.

The first Hot Wheels cars were released in 1968, and the Redlines were the first series of Hot Wheels cars to hit the market. These early models featured metal bodies and bases, and were designed to be raced on Hot Wheels tracks. The Redlines were notable for their low-friction wheels, which allowed them to travel faster and farther than other die-cast toy cars.

The Redlines were an instant success, and quickly became one of the most popular toy lines of the late 1960s and early 1970s. Mattel released new models every year, with each series featuring new designs and colors. Some of the most sought-after Redlines are the “Spectraflame” models, which featured a special metallic paint that made the cars shimmer and shine.

The popularity of the Redlines began to wane in the mid-1970s, and Mattel eventually discontinued the line in 1977. However, the Redlines remain a beloved collector’s item among fans of vintage toy cars, with some rare models fetching high prices at auction. Today, Hot Wheels continues to produce die-cast toy cars, with new models and designs released every year.