This product features a genuine redline sidewall style, sometimes known as a red stripe, due to the thin 3/8-inch strip rubber. This means that the red rubber is added directly to the tire sidewall during initial construction of the carcass, resulting in a truly integrated, high-quality product after vulcanization. Redline tires hit the American automobile market in 1964 with the introduction of the Pontiac GTO and remained a popular muscle car tire until around 1970.