The EVO Bar is the evolution of all the best features of the original Pro Taper and Contour models. The Pro Taper EVO handlebar employs the latest bend of proprietary alloys and processing techniques in manufaturing. * The EVO model utilizes a computer 4mm wall design, thus making the handlebar lighter and giving it a more sensitive feel. * The EVO is based on the same platform as our original Pro Taper bar but we have added some great improvements * All EVO handlebars are manufatured to more exact rise and pullback specifications and tolerances to provide a consistent and accurate feel * Independent lab tests show that the EVO handlebars outlast every other handlebar on the market in fatigue life