Posted July 30th, 2015 by admin
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Irish ripper Finn Mellon joins K4fins.

We’re stoked to announce that Finn Mellon has joined K4 fins team.


Brandon bay local 16 year old Finn is currently leading both the Irish junior and ams fleet ! Finn has been turning heads with his sailing and surfing recently.


“I am loving my new K4 fins . I really like how they feel on a wave. First time I used them I won both the ams and junior of the Irish wave series. I am also having great fun with the harness mount. I cannot wait for a big day at mossie’s with it !!”


“I have improved massively over the last 6 months, as I have had great conditions on my door step all year round plus I also spent lots of time sailing in South Africa this winter.”


And to follow more of Finn’s sailing and Surfing check out his blog



Posted June 20th, 2015 by admin
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K4fins welcomes Simon Dunton to the SUP team.

“I’m super stoked to announce I have a new sponsor – K4 fins!


I’ve been pretty keen on K4 fins for a while now due to the performance, price and plethora of options available. I’m looking forward to being able to experiment a lot more with my fin setups to get the best out of my boards in varied conditions; as well as spread the K4 love and encourage others to experiment a little more and see how new fins can alter their ride.

I’ll be showing off these little yellow fins in SUP surf competitions later this year!”

K4 founder, Steve Thorp

“We’re really please to have Simon as an official K4 team rider. We spotted him and his huge ‘SUPNorth’ van at the beach a while back and noticed he had K4fins in his board. It soon became apparent that he’s the keenest guy out there and spends every possible moment working hard to become one of the worlds top SUP riders . We’re stoked to be able to help and support him on his path to success!”

Posted January 14th, 2015 by admin
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K4fins Ireland storm chase

Stormy Ireland

We’re lucky to have an amazing team of global riders on k4fins, and it’s no different back home. Late last week I had a message from the two most promising up and coming talents in British wavesailing -K4fins team riders Aleksy Gayda and Jony Price. When there’s a crazy forecast looming these two are the keenest to jump in the van or onto the ferry and go score it!


With Jony now living back in Ireland, Leky and myself were able to get over on the ferry as foot passengers. It’s much cheaper this way but does mean taking the minimum of gear and clothing -not ideal when it’s 5 degrees and snowing, and 10knots to almost 50!.

We checked a lot of coast on Saturday morning, but there was only one spot clean enough to work in the WNW wind we had. It was extremely light wind but almost mast high. Check the pics of Aleksy Gayda..

A nice warm up (more like cool down!) for the main event on Sunday.

Big Sunday!

We had grand ideas of scoring this little spot near Mullaghmore again, but unfortunately it proved to be too onshore this time. Last time we went it was perfect mast and a half barrels but no camera man..


So we headed up to the NW.
It was howling. It was raining. It was way over mast high. It was closing out on the inside. It was freezing! There were to be a lot of big swims with claw hands!
It wasn’t easy to get pictures -big thanks to Jony for persevering!

We also caught up with K4fins Irish team rider Oisin van Gelderen who stopped by for a quick wave sail between epic speed sessions! It was windy!

The toughest conditions we’ve sailed in for a long time! Full power 3.7, mogul like 3 foot chop on 2o foot faces, too much wind to sheet in at times and numb fingers. A good test for the fins! Ireland has everything!

A great weekend, we can’t wait for the next one.

Posted November 12th, 2014 by admin
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Loïck Lesauvage tearing up his home spot of Carro

Check out k4fins youngest team rider Loïck Lesauvage in his latest video ‘Waiting January’. This is his last video until January as he’s waiting for his injured foot to heal..

Posted November 7th, 2014 by admin
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Grahams K4fins set up insights – PWA Maui – 2014



My flexible K4 fins give me a massive advantage over most of the other riders who use stiff G10 fins. You can see it in my carves– I can keep speed as I redirect. 

Before the event, I played with a lot of different setups on my boards, which are all tri-fins. I tried using all 12cm Carves. This made my boards super loose but without enough drive. After, messing around with dozens of different options in my boards (of which I had 5 setup for the contest), I settled on a classic 2+1 setup: 10cm side fins and 16cm back fin.

I use the Flex 16cm for the rear and it gives me the confidence to put all my strength onto the rail. The fin is deep enough that I don’t have to worry about spinning out. And no matter how hard I push, the fin bends rather than cavitates. In the Aloha, I was able to keep the board going rail to rail better than a lot of other competitors (I racked up 8 point scores with just rail turns), and my fins make this possible.

On the side fins, I use either the 10cm Stubby’s or the 10cm Ezzy Assy with 2 degrees of tow-in. I ride the stubby’s when I want to do more slidy tricks and the Ezzys when I’m looking for more carves. The Ezzy’s have a ton of drive and acceleration in the turns– which is amazing. And the stubby’s don’t track as well in the water but that makes them easier to release in the tricks like the taka.’

Posted October 9th, 2014 by admin
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Thomas from U-rides K4fins set up.

Le Morne lagoon in Mauritius

Thomas from U-ride has been enjoying a k4fins set up in his Quatro KT Quad at various places around the world and sent us these pics.

“My Stubby 14 and Ezzy asymmetric 8cm 2° loved the windy session in the channel and the perfect waves of the mauritius reef”


“Some backies during a nice summer session (end of august) in Wissant, my home spot in the north of France.”


“Jim, Jules Denel’s dog” R.I.P


“A very windy session at the end of may on the spot of Veulettes, Normandy. Overpowered in 4.0 and I was flying over my friends with my K4fins.”

“All these pics are with my Quatro equipped with Stubby 14 and Ezzy asymmetric 8cm with 2°. I use it in all conditions with 4.0 to 5.0 around the world (France, capetown and Mauritius this year). Next trips are PWA La Torche in October for U-ride and Capetown in january.” Thomas.

Check out U-ride for all the latest windsurfing news.


Posted August 19th, 2014 by admin
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How fast can a composite plastic SUP race fin go..

Marcia YorkPhoto courtesy of Marcia York

We’ve been busy designing a SUP race fin. We moulded the first offs last week and I was pretty chuffed with the results -it looked fast! I started to wonder just how fast it could go…
So I decided to try it in my speed board. Jon Kennet from MOO CUSTOM kindly sent me a Tuttle head to resin on, and it was good to go..



As luck would have it we had a windy day at West Kirby on Sunday (see top pic by Marcia York). It wasn’t all time fast conditions, with fairly light winds for speed and a broad course with rolling chop, but it was a lot of fun and fast enough to put the fantastic plastic through it’s paces!-It was rock solid.

So just how FAST did it go?!

A peak of 42knots (48mph or 77kmh) on the GPS and a 500m time of just under 40 -the fastest 500m of the day!


That must be a record for a plastic fin, and it wasn’t optimised for speedsailing by any means, it’s our SUP weed race fin…


Soon to be available in 21 and 24cm, once we’ve tested it on the SUP race course.

Posted August 9th, 2014 by admin
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K4fins welcomes María Andrés to the team.


We’re stoked to announce that Spanish racer and ripper María Andrés has joined the K4fins team. María is a great ambassador for windsurfing and also a keen Stand Up Paddle-boarder (and editor of supingmagazine).



We asked María what she liked most about the fins..

“I love my new K4fin set for wave riding because it gives me enough grip for a controlled bottom turn without compromising the speed, to hit the lip where I want. And the Cut backs are awesome! -they are loose but in control!”

Fotograma grabado 56

Fotograma grabado 49

Keep up to date with Marías training and results: WEBSITE and FACEBOOK







Posted July 26th, 2014 by admin
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Another great edit from Graham Ezzy..

“This is the result of a summer of wave-chasing. My summer of 2013, to be exact. At that time, I was in the height of my competition hiatus, I didn’t have anything to do but travel around Hawaii and the west coast of North America with Kevin Pritchard finding fun waves and filming them. Most of that footage went to make our Tourists of the Sea series, but looking over the leftovers and throwaway clips unseen by the world, I realized that these were my favorite moments. These clips best express what I set out searching for that summer.”

Posted May 2nd, 2014 by admin
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Rocket man – K4fins 16.5cm Rockets review




One of the newest lines of fin from K4 are the Rockets. Looking like the sleek and svelte wings you’d find on an American muscle car these babies are ready to blast you to the moon. With the brand’s distinct banana yellow colourway, agreeable price point and durability, what’s not to like?

Over to Tez Plavenieks who put the 16.5cm Rockets to good use during the last good blow he enjoyed on the south coast.

Straight outta tha box

Having used a variety of K4s in the past I was keen to get my paws on Mr Thorps latest wave weapons. The Rockets are very distinct looking beasts and will add that much needed bling to anyone’s set up.

Rigid, with a tiny amount of tip flex, I partnered these babies up with my mid-sized wave board and a 4.9m. Keen to test these in real world wave conditions (read chop city) I launched into rippy swell and an onshore wind.

Into the drink

Having played about with positioning I found the Rockets worked best (for kit and conditions on the day) when set just a little behind centre. When my home turf is onshore there’s usually a decent amount of current running and getting off the shingle quick smart is a good idea.

As soon as I sheeted in it was toe hard down and I zipped upwind at a decent rate of knots. There wasn’t any side slip and quick as a flash I was beyond the flotsam and ready to gybe. Arcing into a full power corner the Rockets held their grip and powered me out of the turn red lining once again once the rig rotated.

It soon became apparent why these had been christened Rockets. Fast, efficient and drivey pretty much sums up their straight line performance. I could’ve actually gotten away with a smaller sail, such is the efficiency of these skegs.

Stunt ramp tastic

Although real waves were lacking there were plenty of ramps for flinging yourself in all directions. With the speed and efficiency delivered it was easy to boost to the sky and rotate.

Anyone who knows will tell you I love turbo loops and the K4 Rockets massively help unstick tails and achieve the desired G Force needed.

Tez Speed Loop

Tez Speed Loop

Bothering chop

The session in question was a choppy affair and kit was prone to bounce out. The Rockets, although blisteringly fast, kept my stick in touch with the water and firmly planted. As already mentioned, I could have rigged a sail size smaller, but even with the upper echelons of control being reached I never felt over finned.

Every now and again a steeper bit of chop would wall up and it was possible to crank a quick turn. These were by no means waves of Cornish standards but it did give an idea of how loose the fins were. For skegs so upright they were surprisingly turny and I now can’t wait to get them stuck in to some better surf.

Summing up

Super efficient and fast fins, the K4 Fins Rockets will get you up to warp speed in no time at all. Great for south coast jump fests and although there weren’t any waves of consequence in sight I’m confident they’d perform great.

With a fantastic price point, distinct looks and compatibility across a wide range and size of wave boards, what’s not to like?

Hold in the turns

Hold in the turns


K4 Fins - Specialising in performance wave fins
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