The butted frame has varying thickness, so that the ends are thick to improve the strength of the frame while the middle of the frame is thinner to keep the weight down. The fork of the Aura is ATF 4130 chromoly. This fork is butted like the frame is, and has a grooved design. The handlebars on the Aura are also butted 4130 chromoly. The Sun Rhyno Lite (front) and City Lite (rear) rims will perform best on street terrain. The pedals on the Aura are aluminum platform, like the Asterik 26.