Fins
Retractable Centre Daggerboard System Version 2.0 for Solid / Inflatable iSUPs and Windsurfers
Daggerboard comes flat packed with FREE ABW Straps. You just have to put the bolts in and tighten the nuts.
The WingSUP is simply created by adding a SUP Sailing Centerboard to your SUP by tightening 2 x rack straps around the board. Fix them either side of the carry handle and transform your SUP into a wing powered craft! Learn wind skills - Learn Wing skills and all while having loads of fun and transforming your SUP.
Once you have wind and wing skills, then who knows what will be your next challenge? - will it be foiling?!
Works on solid boards as well BUT you may want to put a thin backing foam to protect the finish on your solid sup / windsurf board. MADE IN THE UK!
K4 Flex US Box Rear Fin for SUP, Paddleboard or Windsurf Board
K4 Flexy US Box Rear Fin for SUP / Paddleboard or Windsurf Board
These can be used as 'twinsers' or as a single rear fin. They come complete with nylon plate and screw for US box fin systems.
"Our original fin for performance wave riding. Lots of flex for amazing grip and looseness on the wave. Raked template for control. A progressive foil for different flows between tip and base. Test winner. Will loosen up a 'stiff' board and are particularly sweet as twin fins as they eliminate that unwanted top turn spin out." - K4 Fins
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This product has multiple variants. The options may be chosen on the product page
K4 Race Paddleboard SUP Fin US Box 21cm and 24cm
Swept back SUP race fin.
45 degree rake so you don’t have to worry about weed or debris.
Foil optimised for paddling speeds, but taking many pointers from our speed windsurfing fins. In fact I stuck this yellow fin in my windsurf and did 48mph on it!
Dynamic Flex material gives more grip, better tracking and more speed than stiffer materials.
An already proven SUP race fin can also be used on windsurfers with US box as a weed fin.
Available in a choice of two sizes:
- 24cm – 255 area – 260g
- 21cm – 210 area – 215g
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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.
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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.
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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
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This product has multiple variants. The options may be chosen on the product page
Starboard Bio Resin Green 18.5cm SUP Paddleboard Fin US Box
Starboard fins for Stand Up Paddle boards are designed to ensure flex and strength, while reducing weight as they are made with Net Positive technology.
This construction is developed from the combination of fishing nets recovered from the Ocean that are recycled along with other materials to increase the performance of the fins.
You can choose from several options with different sizes. This specific fin model is 220 mm in 8.6", but in our store you can choose from several options with different sizes.
These Starboard fins manage to improve the behavior of SUP boards in different situations. Remember to use larger fins for better tracking and speed, and smaller fins for more maneuverability.
Suitable for all boards of the Starboard range and other brands with the US BOX fixing system.
K4 FCS Thruster Fin Set 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. Our asymmetric front fins are available in 8, 10, 12, 13  and 14cm." - K4 Fins
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This product has multiple variants. The options may be chosen on the product page
K4 Futures Symm Pair Side Fins (x2) for Surfboard Paddleboard SUP Windsurf
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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