The Renthal® Twinwall® motocross handlebar features a patented tube within a tube design borrowed from aircraft design principles to achieve the highest strength possible in a moto handlebar. Twinwall®'s superior design construction allows it to withstand the hardest hits and biggest get offs without compromise, making it a popular choice for championship contending athletes worldwide. Since their introduction in 1998, the Twinwall® handlebar has helped more riders win championships than any other handlebar in the world.