Profile Design Aerobar Bracket Kit - Subsonic tri BikeAerobar Bracket Kit Subsonic The bracket is forged to create a sleek low stack design. It offers significantly lower stack than the rest of the range while retaining the extensive reach and width adjustment options. It is compatible with 31. 8mm base bars, our riser kits and 22. 2mm extensions in aluminium or carbon Fit Data: Width Adjustment 37mm, Stack 23. 5mm, Extension clamp 22. 2mm Weight: 352g Product Type Aerobar Spares Product Type Aerobars &