Fourth Element Tech Fin vs Apeks RK3 Fin Comparison

Review by Jill Turner, PADI IDCStaff Instructor 

Our IDC Instructor Jill tests out the Apeks RK3's and Fourth Element Tech Fins

I was excited to try out the new Fourth Element fins whilst diving at Capernwray 14^th&15^th May 2022.

The rubber has a nice feel to it, but they looked a little wider (few mm only) than the RK3s but they were roughly the same weight (not too heavy, but heavy enough to keep my feet in a good position).

I usually struggle to get my fins on my rock boots when loaded with my full side mount system.  Anyone who dives this way knows what I am talking about.  Not a lot of manoeuvrability on land.

When I gripped the rubber handle, I found this to be bigger, both height and width, good for the larger handed diver! (see yellow parts in photo) and more pliable which made it very easy to take hold.  The springs are longer and softer than the RK3s, which made it easier to get them fitted, making a faster entry to the water.

Once I was under the water, I found I did not need to use a lot of effort to manoeuvre, both pivots (360Deg turn) and for propulsion forward/backwards.  In fact, I turned around and saw I had left my buddy team way behind – oops!

Taking them off was simple also, again no need to ask for help.  Very self-reliant fins.

The drain is wide which makes them faster to empty for exiting the water.

All in all – Very Good Fins.  May just have found my next purchase!

Apeks RK3 vs. Fourth Element Tech Fin: Which One is the Best for You?

When it comes to technical and recreational diving fins, two names often come up: the Apeks RK3 and the Fourth Element Tech Fin. Both are excellent choices for divers looking for durability, performance, and comfort. However, if you're deciding between the two, it’s important to know the pros and cons of each to ensure you're making the best choice for your diving style.

In this guide, we’ll compare these two high-performance dive fins and explain why the Fourth Element Tech Fin comes out on top.

Apeks RK3 Dive Fin

The Apeks RK3 is a popular choice among technical and recreational divers, designed to handle demanding conditions. These fins have been inspired by the classic US military and search & rescue fin designs.

Pros of the Apeks RK3:

✔ Durable Material: Made from a single-piece thermoplastic rubber construction, the RK3 is built to withstand tough conditions.

✔ Compact & Lightweight: Ideal for travel due to its shorter length compared to other technical fins.

✔ Spring Straps: Comes with stainless steel spring straps for easy donning and doffing.

✔ Excellent for Frog Kicking: Provides good control in confined spaces.

✔ Trusted by Professionals: Used by military and technical divers worldwide.

Cons of the Apeks RK3:

❌ Limited Thrust Power: While great for frog kicks, the RK3 lacks strong propulsion for flutter kicking in currents.

❌ Softer Construction: Compared to other tech fins, they are more flexible, which can reduce efficiency in high-demand diving situations.

❌ Flotation Issue: The RK3 fins are positively buoyant, which can affect trim and balance, especially for drysuit divers.

Fourth Element Tech Fin – The Better Choice

The Fourth Element Tech Fin is a relatively new contender but has quickly gained a reputation for superior performance and control. Designed for technical diving, these fins address many of the RK3's shortcomings.

Pros of the Fourth Element Tech Fin:

✔ Negative Buoyancy: Unlike the RK3, these fins are negatively buoyant, making them ideal for divers who need better control over trim, especially when wearing a drysuit.

✔ More Thrust Power: The stiffer material and larger blade design provide more propulsion, making them better suited for all kick styles, including flutter and back kicks.

✔ High-Quality Rubber Compound: Provides a perfect balance of stiffness and flexibility, ensuring power without excessive effort.

✔ Comfortable Fit: Designed with a wide foot pocket to accommodate drysuit boots, ensuring a snug and secure fit.

✔ Durability: Made from a heavy-duty rubber material that resists wear and tear over time.

Cons of the Fourth Element Tech Fin:

❌ Heavier than RK3: This may be a drawback for those looking for a lightweight travel fin, but it significantly improves control underwater.

❌ Higher Price Point: The Tech Fin is slightly more expensive than the RK3, but the added performance justifies the cost.

Why the Fourth Element Tech Fin is the Better Choice

While both fins have their strengths, the Fourth Element Tech Fin offers a better balance of power, control, and durability. The negative buoyancy makes them an excellent option for divers using drysuits, and the stronger propulsion ensures better efficiency in demanding conditions.

For divers who want the best trim control, power, and durability, the Fourth Element Tech Fin is the clear winner. If you're looking to upgrade your dive gear, these fins are worth the investment.

SHOP FOURTH ELEMENT TECH FINS

SHOP APEKS RK3'S