This is a five-fin set that can be run as a quad (pictured) or thruster. Two separate fin setups in a single package. The Flying Diamonds FDX-1 Double Tab Tri-Quad Fin Set is a balanced template with all-around performance. With a neutral template that is not overly upright or raked, it’s specifically designed to act as a single fin set that can serve as the performance baseline for any shortboard or mid-length in your quiver.
Fin Size Detail
| Size | Fins | Height | Base | Area | Rake |
| Medium | Front | 4.56" | 4.46" | 17.88"² | 7.13" |
| Medium | Center | 4.36" | 4.47" | 16.85"² | 7.21" |
| Medium | Rear | 4.24" | 4.46" | 16.24"² | 7.08" |
| Large | Front | 4.75" | 4.56" | 19.18"² | 7.33" |
| Large | Center | 4.51" | 4.46" | 17.94"² | 7.29" |
| Large | Rear | 4.5" | 4.5" | 17.78"² | 7.34" |
Product Info
This is a five-fin set that can be run as a quad (pictured) or thruster. Two separate fin setups in a single package. The Flying Diamonds FDX-1 Double Tab Tri-Quad Fin Set is a balanced template with all-around performance. With a neutral template that is not overly upright or raked, it’s specifically designed to act as a single fin set that can serve as the performance baseline for any shortboard or mid-length in your quiver.
Fin Size Detail
| Size | Fins | Height | Base | Area | Rake |
| Medium | Front | 4.56" | 4.46" | 17.88"² | 7.13" |
| Medium | Center | 4.36" | 4.47" | 16.85"² | 7.21" |
| Medium | Rear | 4.24" | 4.46" | 16.24"² | 7.08" |
| Large | Front | 4.75" | 4.56" | 19.18"² | 7.33" |
| Large | Center | 4.51" | 4.46" | 17.94"² | 7.29" |
| Large | Rear | 4.5" | 4.5" | 17.78"² | 7.34" |
Product Details
- Fin Type: FCS II Compatible
- Fins in Set: Five
- Fin Configuration: Tri-Quad
- Fin Tech: AirFlex
Product Construction
AirFlex
AirFlex construction combines a precision-shaped polyurethane foam core with high-strength fiberglass and epoxy resin, creating a lightweight internal structure supported by a durable outer shell. By removing excess weight while maintaining structural integrity, this build delivers a balanced, predictable flex pattern with quick response and smooth feedback under load. The result is a fin that feels lively and responsive through turns, while remaining stable and controlled when conditions demand it.
Additional Info
Built utilizing AirFlex technology with an air core of polyurethane foam, it delivers the lightest possible weight with optimal rebound under load, balancing performance qualities of speed, flow, and response. This makes the FDX-1 ideal for both creating and controlling speed as a thruster or quad.
A new standard in predictable performance, the FDX-1 is built for consistency across a wide range of conditions with every board you ride.
Returns
If you are not 100% satisfied with your purchase you may return it for a refund, or exchange within 30 days of receiving your order.
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