Sonic/Ergo/52a Aerobar Bottom Bracket Fits all sizes rim/tires

Fits all sizes rim/tires

Wide straps and half-open back solution for secure

The disc brake rotor blade which has a 3 layer-sandwich structure of stainless steel

Featherlight & Functional—Robust polyester shell creates a lightweight

Multifilament / Vectran

Sonic/Ergo/52a Aerobar Bottom Bracket Fits all sizes rim/tiresThe Sonic bracket offers an extensive fit range, low weight and easy adjustment along with minimal frontal area. Combining this with the Ergo armrest creates an aerobar that will aid most riders in optimizing their position for both speed and comfort. The 52A is one of the newest versions of our reliable aluminum extension range. Performance The Sonic Ergo is designed to present minimal frontal area to create as little aerodynamic drag as possible.