Cablebox headsets for all our semi-integrated models. List of which one fits each bike below:
4 Port version is used for any bike with mechanical 2x gearing and hydrualic brakes - 105, ultegra
3 Port version is used for any bike with mechanical 1x gearing and hydraulic brakes - grx600, grx800, Ekar, Apex
2 Port version is used for any bike with Di2 or Etap AXS gearing - Ultegra Di2, 105 Di2, Rival Etap, Force Etap