Winchester’s most innovative sled.
The QuadConcave can be broken down into 2 parts:
1. Central Double Concave – Tracks water flow through the centre of the board, which allows you to generate more speed.
2. Outer Venturi Channels – Draws the water flow from a wider entry point into a narrow exit. Based on Bernoulli’s principle, the flow increases in speed as it progresses through the channel.