Canada's Largest Supplier of Apeks RK3 & RK3 HD Fins to Military, Public Safety & Online Divers
STOCK UPDATE: We have new shipments of Apeks RK3 HD fins arriving weekly! If you do not see your preferred size or color currently in stock, please contact us directly so we can check incoming inventory for you.
Apeks RK3 HD Heavy Density Technical Dive Fins
By Apeks | Heavy-Density Stiff Compound | Negatively Buoyant | Oversized Drysuit Foot Pocket | Stainless Steel Spring Straps
Building on the legendary performance of the standard RK3, the Apeks RK3 HD (Heavy Density) is engineered for technical, cave, and commercial divers who require a stiffer blade compound and negative buoyancy. As Canada's largest supplier of Apeks RK3 series fins to military units, public safety teams, and online divers, International Diving Centre provides expert advice and full stock support for heavy-duty cold-water diving gear.
The RK3 HD is molded from a higher density material blend that makes the fin heavier and noticeably stiffer than the standard model. This negative buoyancy helps divers maintain perfect horizontal trim when wearing thick cold-water drysuit undergarments or buoyant drysuit boots, while the increased stiffness delivers maximum power transfer during heavy-load technical kicking styles like the frog kick and reverse kick.
Key Tactical & Heavy-Density Features
- Stiffer Heavy-Density Compound: Specially formulated high-density rubber blend increases blade rigidity for driving heavy twinsets, stage cylinders, or high-drag drysuits.
- Negatively Buoyant Trim Advantage: Heavy density material helps sink floaty feet and drysuit boot legs, allowing divers to establish effortless horizontal trim underwater.
- Hydrodynamic Vented Blade: Dual-channel vents optimize water flow on downstrokes and upstrokes, reducing drag while maintaining precise technical kick feedback.
- Oversized Drysuit Foot Pocket: Open-heel design specifically sized for cold-water drysuit boots, rock boots, and commercial footwear.
- Stainless Steel Spring Straps: Self-adjusting spring straps fitted with custom rubber pull tabs for rapid donning/doffing with 7mm cold-water gloves or dry gloves.
- Carabiner Grommet Eyelets: Features oversized attachment points on both the blade tip and heel tab for secure clipping to your harness or BCD during entry/exit.
Product Specifications
| Brand / Model | Apeks RK3 HD (Heavy Density) |
| Material / Stiffness | High-Density Thermoplastic Rubber (Stiff / Heavy) |
| Buoyancy Profile | Negatively Buoyant (Sinks in Salt & Fresh Water) |
| Strap System | Stainless Steel Spring Straps with Custom Buckles & Push Pins |
| Foot Pocket Fit | Oversized (Fits Drysuit Boots & Rock Boots) |
| Kicking Compatibility | Heavy Frog Kick, Back-Kick, Helicopter Turn, Modified Flutter |
| Stock Status | Shipments Arriving Weekly (Contact shop if size shows out of stock) |
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