Chinook Windsurfing Carbon Extension SDM
Light, strong, and extensively tested in the Gorge. Chinook's Carbon Base Extension fits Standard Diameter Masts (SDM), and features large brass pulleys for improved leverage.
Starboard 2-n-1 R+SDM Extension
DETAILS With the adapter collar, you get an SDM extension. Remove the adapter collar and you have an RDM
Goya Carbon Pro RDM & SDM Windsurfing Extension
Sturdy, lightweight and bomber. We like the Goya Carbon Pro extension for how it simplifies rigging.
Duotone Power XT 2.0 Windsurfing Mast Extension 2021
Chinook Windsurfing Skinny Carbon Mast Extension
Dramatic weight savings for RDM mast users. Featuring the Power Haul 6:1 pulley and cleat assembly, and an easy to adjust adjustment collar. Available in US Base and Euro Pin constructions.