K4
K4 Slot Box Windsurfing blanking plates 100mm & 130mm- Yellow
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K4 Slot Box Windsurfing blanking plates 100mm & 130mm – Yellow
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K4 Mini Tuttle Windsurfing / SUP blanking plates 90mm – Black one size
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K4 US Box Windsurfing / SUP blanking plate 205mm & 130mm- Black
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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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K4 Futures Assy Pair Side Fins (x2) for Surfboard Paddleboard SUP Windsurf
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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.
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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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K4 Scorcher Front US MT SB Windsurfing Fin
Sold as singles for £19.95 each. Please order 2 items for a pair.
The Scorcher fronts. The best choice for your thruster fin board! A wider base for more drive, hold and gouging carves. Like the bigger Scorchers they are thin for maximum top speed and work particularly well for ‘wobble n ride’, onshore, or lighter winds. Available in 9, 10, 11 and 12cm with MT, US and SB (Slotbox/Starbox) heads. These have more drive and grip than the Shark II fronts.
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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.
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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
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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 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.
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This product has multiple variants. The options may be chosen on the product page
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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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
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K4 fins at Andy Biggs Watersports