Opening Times

*Monday to Saturday
9:30am - 5:30pm

Sunday (summer)
10:00am - 4:00pm

Sunday (winter)
10:00am - 1:00pm

*closed all day Tuesday

Product Information

K4 Fins Shark, Carve and Flexy US / Slot Box / Mini Tuttle Front and Rear

Composite Fins for
US / MT- Mini Tuttle / SB -Starboard Slot Box boards.

Shark Front Fins. Supplied as a Pair £22.50
6cm US / SB / MT 
7cm US 
8cm US / SB / MT 
9cm US 
10cm US / SB / MT 

Our front fin for looseness and speed. If you're getting all the grip and drive you need from the rear fins, this is a great front fin for loosening up your quad. Test winner.

Flex: MEDIUM Carve Front Fins. Supplied as a Pair £22.50
11cm US / MT 
12cm US / SB / MT 
13cm MT 
14cm US / SB / MT 
Our front fin for drive and control. Great for big sweeping carves and gouges. Swept flexy tip for maximum grip, high rake for control and wide base for drive.

Flexy Rear Fins. Supplied as a Pair £49.00 or £24.50 Single

12cm US / MT
13cm US / SB
14cm US / SB 
15cm US / SB 
16cm US / SB 
17cm US / SB 
18cm US / SB
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.
For comparative performance ratings Click Here to see the K4 FIN GUIDE.
Note. Mini Tuttle boxes do alter in size, so the K4 head is made to fit the largest box known to man and may need rubbing down to fit slightly smaller boxes.


K4 Fins have become pretty much the number 1 supplier for multi finned board riders as the fins offer a very good option for alternative sizing to that supplied with the board, and at a very reasonable price! But price isn't everything, as the riders include most of the UK's infamous West Coast wave sailors as well as many overseas riders, such as Graham Ezzy and Alex Mussolini, and they will not use fins that don't work! K4 say....
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.


Enquire about this product Visit manufacturer website

A selection of other fins & foils from K4 Fins:

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