2 Bolt Upper w/ Pro-Flex Joint- US Cup

2 Bolt Upper w/ Pro-Flex Joint- US Cup

Regular price $ 92.00

ALL NEW!  Upper Section Only!  The Pro-Flex Mast Base seeks to join the best of both worlds- the ease of use and durability of a mechanical joint, with the slightly softer ride of a tendon.  This new setup will prolong the life of the tendon since it won't be bending as much.  And it will prolong the life of your teeth since the tendon will absorb some of the chop your board encounters while flying across the water :)

Product Details

The all new Chinook Sailing 2-Bolt Pro Flex Mast Base US Base Cup Upper Section features all of the advantages of a tendon base with the added features of a mechanical base. 

  • *** Specifically designed for Foiling (Not recommended for Bump and Jump, Slalom or Formula Racing.  If used as such warranty is null and void.***
  • Same shock absorption as standard Tendon bases for less stress on board, & sailor.
  • Uses standard Chinook Tendon for easy serviceability.
  • Free moving Mechanical hinge provides ease of attachment for larger or wider Foil boards, Formula, & Long boards etc.
  • Small boards less likely to flip over during waterstarts in high wind & wave conditions.
  • Mechanical hinge eliminates an estimated 75-80% of fatigue which occurs due to constant bending of the Tendon.
  • Compatible with Proven Chinook 2 bolt Quick Release Base Plate
  • Also available in Euro-Pin EX versions!


Most orders ship within 1-3 business days. Please contact us before placing your order if you need it on a specific timeline. 
We offer free shipping for full-price items on orders over $250. The following items are not eligible for free shipping: Discounted/sale/closeout items | Used items | Drop ship orders | Oversize items | International orders



    Awesome shop! Very friendly, quick response time and very helpful in making all of my selections. Goes above and beyond offering tips on the item purchased. If they don't have it he will find it. Always a great attitude that makes me more stoked to get in the water. I highly recommend this shop!

    Chad R.
    Spotsylvania, VA

    I’ve placed 5 or 6 orders with Wind-NC and had a great experience every time. Super helpful, responsive and knowledgeable. He takes the time to help his customers. I’ve ordered from most of the main windsurfing shops in the US at various times over the years and Wind-NC has been a step above.

    Jeff L.
    Spencer, MA