Mast Bases - US Cup
The Mast Base connects your rig to your board. It has a flexing universal joint (UJ) in the middle to allow 90 degree flex and 360 degree rotation. It's available in two base connection types: Euro Pin or US cup; two UJ types: Rubber or Tendon; two board connection types: One-Bolt or Two-Bolt.

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Streamlined Twist-On Base US
Streamlined Twist-On Base US
Simply twist on, adjust, or remove by hand. Ultra low profile, on center, and unobtrusive.
MSRP from: $79
Streamlined Quick-Lock Base US
Streamlined Quick-Lock Base US
Double strength. Proven in giant surf! Small, unobtrusive & ultra low profile. The deck plate is secured in two places.
MSRP from: $92
Chinook 1-Bolt Rubber Base- US
Chinook 1-Bolt Rubber Base- US
One of the fastest to install, adjust & remove. This design is very low to the deck and easy to adjust.
MSRP from: $67
Chinook 1-Bolt Tendon Base- US
Chinook 1-Bolt Tendon Base- US
One of the fastest to install, remove & take off the board. This design is very low to the deck and easy to adjust.
MSRP from: $77
Chinook 1-Bolt Mechanical Base- US
Chinook 1-Bolt Mechanical Base- US
One of the fastest to install, adjust & remove. Mechanical joint makes for quick separation of rig.
MSRP from: $72
Chinook 2-Bolt Rubber Base- US
Chinook 2-Bolt Rubber Base- US
A proven bombproof design for 20 years. Built in wrench for quick position adjustment.
MSRP from: $78
Chinook 2-Bolt Tendon Base- US
Chinook 2-Bolt Tendon Base- US
A proven bombproof design for 20 years. Built in wrench for quick position adjustment.
MSRP from: $87
Chinook 2-Bolt Mechanical Base- US
Chinook 2-Bolt Mechanical Base- US
A proven design incorporating a built-in wrench and safety-lock mechanism.
MSRP from: $77