K4 Fins specialise in innovative & revolutionary performance wave, freestyle, freeride & freestyle-wave windsurfing fins. Our fins are unique to windsurfing. They’re made using plastic composite – giving them extra flex, reflex & outstanding performance.

Our dedication to water time and designing the best performing products on the market means that we are constantly innovating and expanding our product range so that we can break new ground.

After years of testing and development, K4 Fins are now stocked worldwide and we have a range that covers not only windsurfing but SUP, kite and shortly surf fins to suit all riders and styles.

Our speed windsurfing fins have done over 50 knots on the speed course and are used by many of the world’s top watersports professionals. The wave fins have ridden the infamous big wave surf spot Jaws and the offshore slab at Pedra Branca in Tasmania.

K4’s classic Dynamic Flex material with the black logo gives flex that works with the power you’re putting in allowing you to drive hard and fast and giving power back for turns. Its ability to flex and spring back to its original shape means crazy grip at extreme angles of attack and epic round house turns. The flex makes it easier to crank back up hard at the critical section, then gouge or power through the lip at full velocity

K4 Fins are able to offer you the best fin prices on the market, yet high end performance due to our agile business model. We’re not a big company and we make all our products in house in the UK which means that the process is streamlined without incurring additional costs.

Available for 2016’s Leon, 3SW, Fang and selected front fins , we have developed an alternative to our original flex material that compares with the stiffness of a G10 but with faster reflex and better memory for speed, maneuverability and acceleration making this material the perfect fit for the all-rounder Leon, 3SW’s waves, freestyle or bump and jump capabilities or for freeride windsurfing with the Fang fin.

This benefit is doubled to you because you get a saving on the product cost as well as high performance meaning that you can get as many fins as you need to meet your needs.