US/Standard Base

Windsurfing Fins, check out our huge selection of True Ames, Select Fins, MFC, RRD, Black Project, Kona, US standard box / A-base options. In-line and closeouts, save big! Windsurfing fins Matching fin design and size to your board, sail size and sailing conditions will optimize windsurfing performance. A fin generates lift as it travels through the water, while your sail does the same when harnessing the wind. Balancing these lifting forces affect control and performance of your board. Too large of a fin can cause excessive lift and drag. Too small of a fin contributes to poor planing and cavitation (spin-out). Cavitation feels like your fin is no longer attached as your board slides sideways at high speed. This page features Fins with US / A box type bases.
  • True Ames Slalom Pointer A Base

    Great all around free sailing fin with moderate aspect ratio and slightly swept outline.

    From: $80.00

  • True Ames Convert A Base

    A fantastic all around fin. Superb jibing and very loose for a "wave blade".

    From: $110.00

  • MFC All Around A Base

    All around fin ideal for bump-n-jump and wave conditions. Great wave / freewave design.

    From: $117.00

  • True Ames JD Wave A Base

    Now $69. Excels in tricks and transitions. Use in all conditions: lake, bay and ocean.

    From: $69.00

  • True Ames Surf Grass A Base

    A weed / surf sailing fin that's ideal for bump and jump and wave sailing conditions where weeds are a problem.

    From: $110.00

  • MFC SC Weed Wave A Base

    $99 for in stock sizes.
    For high wind or wave sailing in conditions where there is seaweed or moderate weeds in fresh water.

    From: $99.00

  • True Ames Enduro A Base

    Looking for a great wave/bump & jump fin? The Enduro is one of our favorites.

    From: $105.00

  • Fin Tab & Screw (US box)

    You lost it...we got it. Replacement Fin screw and plate for US fin box.
    $5.00
  • Fin Fast

    Unique fin screw allows for rapid securing of A-base fin to US slot fin box.
    $5.00