Profile Design Sonic Ergo 4525a Clip On Aerobar

The Sonic/Ergo is designed to present a minimal frontal area to create as little aerodynamic drag as possible. The main purpose of an aerobar is, of course, to get the rider into a fast position despite a fairly minimalist appearance the Sonic/Ergo offers a comprehensive fit range for exactly this purpose.

The Sonic bracket has been designed as a successor to the J2. With this update it brings Profile Design’s new fit range to a wider range of price points, replacing the J2 bracket. The Ergo armrest has been created to offer both a huge upgrade in fit range as well as increased rider comfort with a supportive curve to cup the arms. There are 100 distinct position options achievable just by moving the armrests. Combine that with the risers and this bar offers 1500 possible configurations. As a clip on bar it is also possible to adjust the extension width and tilt easily.

The 4525a extensions have a first section at 45° and the grip at 25°. The rider can choose whether to hold high for the shrugged position or low for a more open, head up position. The 4525a offer a 7.5mm lateral shift per side. This allows the rider to get their hands narrower or wider without tilting the extensions so much that they touch the shifters. The extension length and rotation can be easily adjusted using the top bolt.

Fit Data Armrests:

Offset: -70mm to -2.5mm in 7.5mm steps
Width: 124mm to 290mm in 18.5mm steps
Included in delivery: 1x clip-on bar incl. pads
Material: aluminum
Weight supplement: manufacturer information