US Base Cup

Fits most standard mast tracks and bases. 

Tendon joint provides excellent performance and is easy to replace. This unique design is very low to the deck with four finger ribs for easy adjustment.

Rubber joint provides shock absorption in choppy conditions. This unique design is very low to the deck with four finger ribs for easy adjustment.   1-Bolt Rubber Mast Base US Cup 1-Bolt Twist-On Mast Base Universal Complete US Base Cup Rubber...

Mechanical joint is easy to attach to wide boards and provides instant drive to race boards. This unique design is very low to the deck with four finger ribs for easy adjustment.

Epic Gear Euro Pin to US Cup Adapter Kit An Epic Gear Euro Pin to US Cup Adapter Kit to make a Euro Pin mast base fit a US Cup Mast Extension.  Made to attach to the base with an stainless steel C-clip. Comes with 2 button spring clip.

The sleek Six Pin adjusting collar and anodized logo/index markings are some of the unique and innovative features that make these the most popular extensions on the market. Standard with the proven US Power-Haul pulley and cleat system and 2 cm...

The new Six Pin adjusting collar and anodized logo/index markings are some of the unique and innovative features that make these the most popular extensions on the market. Standard with the proven US Power-Haul pulley and cleat system and 2 cm adjustment...

Tendon joint provides excellent performance and is easy to replace. This proven design incorporates a built-in wrench for baseplate adjustment and a safety-lock mechanism. Indisputably the most dependable and easiest to use base available.

Upper part only for Two-Bolt "Quick Release" Tendon Mast Base.

Upper part only for Two-Bolt "Quick Release" Mechanical Mast Base.

The sleek Six Pin adjusting collar and anodized logo/index markings are some of the unique and innovative features that make these the most popular extensions on the market. Standard with the proven US Power-Haul pulley and cleat system and 2 cm...