Web Store
K4 Incinerator Front US MT SB Windsurfing Fin
The Incinerators. The best choice for your quad fin board! A narrower base for higher speeds and lightning fast direction changes, combined with a larger area tip for more hold and power. Designed with Adam Lewis who’s been looking to get the best performance from his quads.
Available in 8, 9, 10, 11cm with MT, US and SB (Slotbox/Starbox) heads. Select one size larger if you wish to have the same hold as our other fronts.
Sold as singles for £19.95 each. Please order 2 items for a pair.
Select options
This product has multiple variants. The options may be chosen on the product page
K4 Shark II Slot Box / Star Box PAIR Paddleboard, SUP, Windsurfing Fins
The all new Shark II fronts. Our team riders wanted a fast and grippy fin for both their quads and thrusters. So we set about designing a fin that was sleek and lower tip area using our ‘super stiff’ material. We slimmed it right down to give back some flex and grip, and widened the base to add hold and drive. The result was a fast and precise feeling fin with just the right balance of grip and release. Already taking Alex Mussolini to a podium finish in Tenerife.
Notice that the SB head will now suit both ‘Slot box’ and the new ‘Star box’ which comes with some Starboard and Severne models.
We’ve also added a 1º option to the SB heads. This is for those with straight boxes who wish to add a bit of toe in for a looser feel. Order two SB 1º fins and you will receive a ‘left and right’ pair.
Also available in 8, 9, 10, 11 and 12cm with MT, US, SB (Slotbox/Starbox) and SB 1º.
SOLD AS A PAIR
Select options
This product has multiple variants. The options may be chosen on the product page
K4 FCS Surf Symm Side Front Fin Pair
These fins are Symmetrical.
"We’ve had a unanimous thumbs up for the K4 Fins SUP surf fins; from the Bluesmiths team using them in Maui perfection, to the likes of big wave ripper Finn Mullen in Ireland, through to those in the UK having their first experience of Stand Up Paddling.
We’re excited to bring you a substantial range of sizes in the K4 shop to tune your board for every wave. Our asymmetric front fins are available in 8, 10, 12, 13  and 14cm." - K4 Fins
These K4 surfboard FCS fins are perfect for directional kiteboard surfboards, normal surfboards and wave sups. Buy the 10cm ones for a looser feel or for smaller boards and buy the 12cm for pretty much everything else.
Select options
This product has multiple variants. The options may be chosen on the product page
K4 Futures Assy Pair Side Fins (x2) for Surfboard Paddleboard SUP Windsurf
Select options
This product has multiple variants. The options may be chosen on the product page
K4 Futures Thruster Fin Set (x3) for Surfboard Paddleboard SUP
"We’ve had a unanimous thumbs up for the K4 Fins SUP surf fins; from the Bluesmiths team using them in Maui perfection, to the likes of big wave ripper Finn Mullen in Ireland, through to those in the UK having their first experience of Stand Up Paddling.
We’re excited to bring you a substantial range of sizes in the K4 shop to tune your board for every wave.
Select options
This product has multiple variants. The options may be chosen on the product page
K4 Ezzy Assy 2 Degree Fins Slot box pair
K4 Ezzy Assy 2 Degree Fins Slot box pair
The Ezzy Asymmetric fin! More power, more drive, more speed, less drag.
The Ezzy front fin has a similer template to the Stubby but with a wider chord. A fully asymmetric foil with a radiused front and slightly positive inner foil to aid flow at high speeds. Choose a smaller fin size for less drag, same power. Great for huge gouging hooky cut backs!
SOLD AS PAIRS
Select options
This product has multiple variants. The options may be chosen on the product page
K4 Shark Slot Box Paddleboard, SUP, Windsurfing Fins
K4 Shark Slot Box Paddleboard, SUP, Windsurfing Fins
K4 fins have created a unique and new material for windsurfing. OptoFlex is a molded resin long fibre matrix that has been carefully manipulated to provide the perfect flex patterns for windsurfing. Our K4 technicians took a long time to create the perfect material with the qualities needed to provide the performance we now appreciate. Lighter, snappier and with outstanding flex memory
Sold as a pair but if you would like a single for £11.25 just ask.Â
Select options
This product has multiple variants. The options may be chosen on the product page
K4 Shark 2 Mini Tuttle Paddleboard,SUP, Windsurf Fins
K4 Shark Mini Tuttle Paddleboard,SUP, Windsurf Fins
K4 fins have created a unique and new material for windsurfing. OptoFlex is a molded resin long fibre matrix that has been carefully manipulated to provide the perfect flex patterns for windsurfing. Our K4 technicians took a long time to create the perfect material with the qualities needed to provide the performance we now appreciate. Lighter, snappier and with outstanding flex memory.
Sold as singles. If you want a pair, please buy 2.
Select options
This product has multiple variants. The options may be chosen on the product page
K4 FCS Surf Assy Side Front Fin Pair
These fins are Asymmetrical.
"We’ve had a unanimous thumbs up for the K4 Fins SUP surf fins; from the Bluesmiths team using them in Maui perfection, to the likes of big wave ripper Finn Mullen in Ireland, through to those in the UK having their first experience of Stand Up Paddling.
We’re excited to bring you a substantial range of sizes in the K4 shop to tune your board for every wave. Our asymmetric front fins are available in 8, 10, 12, 13  and 14cm." - K4 Fins
These K4 surfboard FCS fins are perfect for directional kiteboard surfboards, normal surfboards and wave sups. Buy the 10cm ones for a looser feel or for smaller boards and buy the 12cm for pretty much everything else.
Select options
This product has multiple variants. The options may be chosen on the product page