Windsurfing Bases and Extensions

Windsurfing mast bases and extensions for every type of current windsurfing board and rig, visit Isthmus Sailboards for the largest selection and best prices in one location. Click on a category to find the right mast base and mast extension gear for your needs. Windsurfing mast bases and mast extensions are available in a variety of compatibility types and constructions. Mast base and mast extension types include; US Cup (US), Euro Pin (EP) base to extension connection types, and 1-bolt, 2-bolt mast box or sliding mast track pin options, Skinny RDM (Reduced Diameter Mast) or SDM (Standard Diameter Mast) extensions. Mast bases are available with Rubber, Mechanical or Tendon universal flex joint (UJ) types. Mast extensions vary in construction from Aluminum, Carbon and Plastic. We offer a wide variety of bases, extensions and mast base parts from; Aeron, Chinook, Streamlined, Bic, Neil Pryde, Exocet, Epic, North, Mistral and more. From basic parts to a full line up of performance oriented bases and extensions to custom specialty parts for older model windsurfing boards, Isthmus Sailboards has the best options, prices and availability in the windsurfing market. Call or email us if you have any questions.