• Mast bases are small but very important items when windsurfing. Personally I prefer TENDON JOINT mast bases. They have a really direct transfer of power from sail to board. The picture shows the tendon. Black tendon screwed tight between the metal parts in the middle.

    There are two main types of mast base with a tendon joint,

    I know many experienced windsurfers that sail in rough conditions and it seems a personal preference which you choose. Just make sure it fits your mast extension.

    The mast base at the picture is a Chinook with a M8 Pin. I have replaced the tendon myself and that was easy.