Engineered for divers who prioritize reliable thrust and precise maneuvering, the Apeks RK4 brings the dependable feel you expect from apeks fins to everything from surgey shore entries to current-swept wrecks. If you know and love the RK-line—including the proven rk3—the RK4 continues that legacy with a focus on balance and control.
Part of the broader apeks dive gear ecosystem, the RK4 is built for years of service with a rugged compound, efficient hydrodynamics, and a comfortable spring-strap fit. Compact enough for travel yet authoritative in the water, these fins deliver dependable responsiveness every dive.
- Confident thrust with excellent feedback for frog, helicopter, and back kicks
- Secure spring heel straps for quick don/doff with gloves or boots
- Streamlined blade channels water to reduce drag and improve stability
- Rugged compound resists nicks and abrasion in demanding environments
- Balanced for cold-water, tech, and travel diving alike
Authoritative Thrust, Precise Handling
The blade profile channels water efficiently for strong acceleration while maintaining predictable tracking. The result is confident progress in current and the control you want for tight positioning around reefs or wrecks.
- Stable platform for camera work and task-heavy dives
- Responsive to subtle ankle movements
- Minimizes side-slip during back and helicopter kicks
Comfort That Stays Put
A supportive foot pocket and stainless spring heel straps make entries and exits fast, even with thick gloves. Once on, the RK4 stays secure without hotspots, so you can focus on the dive.
- Quick don/doff with positive heel purchase
- Supportive pocket for neoprene boots
- Consistent fit across long dive days
Built for Hard Use
From rocky entries to ladder exits, the RK4’s rugged compound and solid hardware are made to take abuse without losing performance.
- Resists nicks and abrasion
- Hardware designed for saltwater use
- Reliable over many seasons of diving
Travel-Friendly Performance
Compact enough to pack, yet powerful enough for currents and surge. Ideal when you want one fin that handles warm-water trips and cold-water training alike.
- Balanced length for packing and kicking
- Predictable feel across different exposures
- Everyday versatility for varied conditions
Why Buy from Bluewater Photo
Apeks builds equipment trusted by demanding divers worldwide. Your RK4 fins are backed by Apeks’ manufacturer warranty and our knowledgeable support team. Bluewater Photo is staffed by experienced divers who can advise on sizing, strap setup, and configuration for your environment.
- Expert, real-world guidance from our dive team
- Responsive after-sales support
- Hassle-free returns per store policy
Put confident control and solid thrust on your feet—dive the Apeks RK4.
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Specifications
- Sizing & Fit
- Open-heel design optimized for neoprene boots
- Spring heel straps for secure, repeatable fit
- Choose size based on boot thickness and foot length
- Performance
- Stable for frog, back, and helicopter kicks
- Efficient water channeling to reduce drag
- Balanced feedback for precise positioning
- Build & Hardware
- Rugged fin compound for long-term durability
- Stainless spring straps with heel pull tab
- Low-maintenance design suited to frequent diving
- Compatibility
- Works with most standard neoprene dive boots
- Appropriate for recreational, technical, and training use
- Complements the proven RK-line heritage (e.g., rk3)
- Apeks RK4 fins — pair
- Stainless-steel spring straps (pre-installed)
Why Buy from Bluewater
1. Proof of Expertise
- Authorized Apeks dive gear dealer — full manufacturer warranty.
- Founded and staffed by active divers, underwater photographers, and explorers.
- Decades of combined hands-on experience with the gear we sell.
- We test and use most of the equipment ourselves before recommending it.
2. Risk-Free Purchase (See Terms Of Service)
- 30-day, hassle-free returns (unused condition).
- Secure payment with trusted gateways (credit card, PayPal, etc.).
- All products shipped in factory-sealed boxes (unless stated).
- Transparent policies — no hidden fees or fine-print surprises.
3. Fast & Reliable Delivery
- Free U.S. shipping over $200 for Photo Gear & $50 for Dive Gear.
- Same-day dispatch on in-stock orders placed before 12pm.
- Worldwide shipping options with reliable carriers.
- Real-time tracking updates sent straight to your inbox.
4. Extra Value at No Extra Cost
- Lifetime product support by email, phone, or in-store.
- Setup help & usage tips tailored to your needs.
- Exclusive buyer’s guides, tutorials, and dive trip invitations.
- Early access to special promotions & new releases.
5. Social Proof & Community
- Thousands of satisfied divers & underwater photographers worldwide.
- 5-star average product & service ratings.
- Active in dive events, conservation projects, and photography competitions.
6. Personal Connection
- Direct line to our in-house experts — no outsourced call centers.
- Friendly, passionate staff who speak “diver” fluently.
- We care about your whole adventure, not just the sale.
We offer lifetime support with all purchases.
Please call or email us with any questions; our knowledgeable staff would love to assist you.
