The Profile Design Neosonic Ergo 45AR Aerobar 240mm is a highly adjustable shorty style aerobar built to help you dial in a more compact, comfortable cockpit. By pairing the Neosonic platform with an Ergo armrest, you can move your armrests well behind the basebar in fine increments, giving you a huge range of fit options for better aerodynamics and all-day comfort. With its 45AR extensions, this bar is also a versatile go-to for road, gravel, packing bikes, and even draft legal triathlon when set to meet the rules.