Twinwall® are engineered for the toughest of conditions. The Twinwall feature a patented design that borrow aircraft design principles by utilising two tubes. Providing the rider with a combination of Strength, lightweight and safety. Since their introduction in 1998, the Twinwall® have been the handlebar of choice for more professional race teams and has helped more riders win championships than any other handlebar in the world. Diameter a(810mm), diameter b(99mm), diameter c(70mm), diameter d(110mm), diameter e(40mm), diamter f( 195mm).