The subsonic bracket has the lowest drag coefficient of all our aerobar brackets
  
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