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Apeks TEK RK3 HD

  • Apeks TEK RK3 HD
  • Apeks TEK RK3 HD

Apeks TEK RK3 HD

Product description Apeks TEK RK3 HD

Designed in collaboration with the US military and renowned for outstanding performance and reliability, the Apeks RK3 is a rugged thermoplastic rubber fin featuring an over-sized foot pocket to accommodate drysuit boots and a spring strap for easy donning and doffing. The RK3 is available in three sizes: Medium, Large and Super.


Based on one of the first vented rubber fins sold in North America and popular among military and professional divers.
Compact, and ultra-rugged for use in harsh environments.
Improved foot pocket with spring straps for ease of use with cold hands or thick gloves.
The design has been the standard gear issue fin for military, special ops, coast guard and public safety divers for decades.
Short wide blade provides maximum forward thrust while maintaining great manoeuvrability.
Vented blade design reduces resistance on the upstroke and enhances thrust on the downstroke.
The vents also eliminate vortexes that can occur along the back of the blade much in the same way split fins eliminate the vortex.
The blade material designed to hold up in the toughest environments, temperatures and abuse.
Two large grommet holes designed to fit most karabiners for easy storage of the fins while accessing the dive site.
Spring straps as standard.
Custom designed buckle holds spring straps in optimum position.
Simple push pin design allows simple replacement of springs if necessary.

Medium: 982gm per fin
Large: 1.19kg per fin
Super: 1.27kg per fin


Large x Width:

- Size M: 48,2 cm x 22.5 cm.
- Size L: 54,4 cm x 23.5 cm.
- Size XL: 57 cm x 23.5 cm.

- Size M: 22,5 cm.
- Size L: 26 cm.
- Size XL: 27,5 cm.

Width footpocket:
- Size M: 9 cm.
- Size L: 9,7 cm.
- Size XL: 10 cm.

Apeks TEK RK3 HD has the Apeks official manufacturer warranty. As an Apeks official retailer, all our offered dive items are covered by a 2 years manufacturer´s warranty. In scubastore, we are dedicated to select high quality Fins, masks and snorkels products which will make your activity more comfortable. We have a variety of Open heel fins items to suit your needs and to make you feel inspired to do more sport in your daily routine.

Features Apeks TEK RK3 HD

Recommended use

Customer reviews and questions (13)

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(existing customers only)



Super fins .. I changed my jetfins for these rk3 HD. Very responsive and slightly lighter and more flexible than the old ones. Super fast delivery ... at the top ...



I have used them on three dives and I am happy. My previous fins were CRESSI Master Ara, in caves it was difficult to move with them being so long. With the RK3 HD it is much easier to maneuver since they are smaller without losing reaction. My advice to the buyer is to get the boots first, then use the fin pocket size to decide size. In this way you will not have to make the purchase twice, as I did.

Happy and satisfied


It took me a long time to acquire this fin because of the price and shipping conditions to my country. I recently took advantage of a promotion and bought the fin that confirmed my expectations. Made of quality material, the RK 3 is an old success that is perpetuated over time.

Apeks TEK RK3


Powerful fin! Use not too much effort as expected.

Opinion on the rk3


I have acquired these fins that have fulfilled my expectations, very easy to put on and take off but once put on perfectly adjusted. Specific for technical diving, very happy with my purchase.



Thank you! Excellent product, good delivery and on time. It fulfilled my expectations

The definitive fins


After thirty years of activity, on the advice of a friend who is responsible for Apex sales, I tried them, perfect, comfortable, logically recommended for the frog, they already have the springs supplied .... what else to say .... Stra recommended !



I have been an instructor for more than 18 years and have tried countless fins. They are somewhat heavy, but they are compensated with their flapping facility, either frog or traditional style, they give a good thrust and maneuver control. Not recommended for people with little experience, but highly recommended for technical or high level divers.

Tested and approved !


Meets my expectations!

Weight of rk3


Hello! I would like to know how much the two RK3 fins weigh please. Thank you very much!

our experts answer

Hello! in M size, 1.9 kg. Thanks for your question!

Foot Pocket size dimensions


Could you please provide the foot pocket dimensions of the Large and Super sizes? Width, Height, Length (from toe to heel)

our experts answer

Hello! on the Large size, it is total length 54.4 cm/ total width: 23.5 cm/ footpocket depth 26 cm/ width 9.7 cm/ height 7 cm. Thanks for your question!

I need information


Hi: Are the fins to be worn with sole pads? How long would the length 46-48 be? Thank you very much in advance

our experts answer

Hello! yes, they are fins designed to go with boots with sole. They are a really heavy model. Length 50 cm aprox. Thanks!

Duda sizing


Hello good wanted to know who exactly belongs to size M size and whether it would be suitable for a size 40 which is what I have. Greetings and thank you.

our experts answer

Good morning, we confirm that the size 40 would size M. Greetings

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