Apeks RK4 Fins side by side
Apeks RK4 Fin - Black
Apeks RK4 Fin adjustable spring strap
Apeks RK4 Fin Side Blade
Apeks RK4 Fin Top View
Apeks RK4 Fin rubber pull

Apeks RK4 Fins - Black

Sale price£176.00

The sleek new Apeks RK4 fins offer optimal performance and exceptional manoeuvrability whether you’re frog kicking, back-finning, or diving open water with up and down strokes. With their adjustable stainless fin straps, they can be used with wetsuits or drysuits for energy-efficient dives.




Dispatched in 1 to 2 days

Contact Form & Details

How can we help?

If you need to contact us for any issue or assistance, you can do so online by filling out the online Contact Form, emailing us at sales@dirdirect.com or calling us on +44(0)1305 824 555. If it's about a purchase you've made for us please also include your order number.

Our brick-and-mortar store Underwater Explorers based on Portland, Dorset is staffed 7 days a week, including weekends and bank holidays. As it's an active store visited by divers from around the country and world regularly, if we can't make it to the phone for any reason please leave a message and we'll get back to you asap.

Any queries are usually answered the very same day and at most within 24 hours.


Why Portland?

We’re located on the Isle of Portland (in Dorset) because Portland has been one of the most popular scuba diving locations in the United Kingdom even before we set up operations here back in the year 2000.

On one side, we’re minutes away from the sheltered waters of Portland Marina and Harbour, while on the other, it’s just a brief walk to reach our famous scuba diving destination Chesil Cove and start of the 16-mile-long Chesil Beach.  

Portland’s location makes it ideal for scuba diving, freediving, snorkelling and other surface water sports activities. 

Check out how many wrecks we have around here by clicking on Scimitar Diving's Wreck & Dive Sites chart!

Alongside dive clubs, many instructors and dive schools travel here to train and offer scuba diving certification ranging from open water diver to mixed-gas tech diving or rebreather diving levels.

Whether you’re doing a boat dive from Portland Marina or Castletown or a shore dive at Chesil Cove, Portland is well known for offering many possibilities: Reef diving to wreck diving and night diving, underwater photography or underwater videography. Anything other than cave diving is possible here.

Likely being the best-stocked diving shop in the UK, at Underwater Explorers we offer in-store scuba diving equipment advice and sales, as well as gas fills, to locals and visitors (read About Us).

But... If you’re googling “scuba diving shop near me” like some, look no further, there's DirDirect online.

Here at DirDirect, we list our cutting-edge equipment for worldwide delivery and we’ve got you covered whatever your level of diving: We’re your local dive store wherever you are in the world.

All that with over 20 years of experience especially in technical diving, from training to equipment, advice and sales.


Underwater Explorers, Unit 1, Maritime Business Centre
Mereside, Portland, Dorset, DT5 1FD


The new Apeks RK4 Fins deliver optimum performance and excel for frog-kicking and back-finning underwater, without being too heavy or excessively rigid. 

You'll be conserving energy with these compact, wide-blade technical fins which provide outstanding manoeuvrability in confined spaces and overhead environments, easy finning in open spaces whether during an upstroke or downstroke.

With the RK4 fin, Apeks has Increased the edge of the blade on the side to give you more control underwater, yet kept some flexibility on the fin tip so it doesn't feel too rigid.

The Apeks RK4 Fins have an adjustable fin strap which allows one or both sides to be adjusted back or forward for optimal fit - each side by around 2cm. A nice big durable pull at the back makes it easier to don and doff in a drysuit (although the discerning divers among you worried about entanglement can still cut off the pull-handle while retaining the rubber guard on the spring.

Weight-wise the RK4 fin sits somewhere between the RK3 and RK3 HD. It's neither super heavy nor too rigid, which makes it comfortable for all sorts of divers whether in drysuit or wetsuit - in short, it is a great all-round fin.  

Features of Apeks RK4 Fins

  • Modern style technical fin that delivers the ultimate performance.
  • Durable and easy to recycle with one piece rubber construction.
  • Easy to put on and take off, even when wearing gloves.
  • Reduces snag hazards with integrated stainless-steel buckles that are durable and tough.
  • Provides exceptional maneuverability and allows small accurate movements in confined spaces, reducing disturbance of sand and silt. Perfect for frog-kicking.
  • Delivers a more energy efficient dive with optimum performance on both the upstroke and downstroke.
  • Allows quick and easy changes between settings for wetsuits and drysuits, with 2 adjustment points and stainless-steel spring straps.
SKU: FA3780101L

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