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Front fins 4.9” high Rear fins 3.1” high Foil: all four fins flat inner face.
The 4.9" / 3.1" DTR Quad Fins are engineered for surfers chasing speed, drive, and controlled release. Built in black carbon fiber with natural Pro Glass, this quad set delivers a powerful yet responsive feel, ideal for modern performance boards and retro-inspired fish and hybrids.
The larger 4.9" front fins generate strong down-the-line drive and hold, while the 3.1" rear fins provide smooth transitions and fast release through turns. Carbon fiber reinforcement increases stiffness and response, while Pro Glass construction ensures durability and reliable flex under load.
Fully FCS II compatible, these fins install tool-free and lock securely into your fin boxes, making them perfect for everyday surfing in beach breaks, point waves, and reef setups.
Key Features
Quad fin setup for speed, drive, and control
4.9" front fins + 3.1" rear fins for balanced quad performance
Black carbon fiber reinforcement for increased stiffness and response
Natural Pro Glass construction for strength and longevity
FCS II compatible – tool-free installation
Designed for fish, hybrids, and performance shortboards
Smooth release with excellent hold through turns
Performance Benefits
Faster acceleration and improved down-the-line speed
Strong drive without sacrificing manoeuvrability
Stable feel in steeper or hollow conditions
Responsive flex pattern for confident rail-to-rail surfing
Recommended Conditions
Beach breaks, points, and reefs
Waist-high to overhead surf
Clean to punchy conditions where speed and control matter
Fin Specifications
Configuration: Quad (4 fins)
Front Fin Height: 4.9"
Rear Fin Height: 3.1"
Construction: Black Carbon Fiber / Natural Pro Glass
System: FCS II
Set Includes: 4 fins (quad set)
FAQs
Are these fins suitable for fish surfboards?
Yes. The DTR quad template works exceptionally well on fish and hybrid boards, enhancing speed and control.
What does carbon fiber add to these fins?
Carbon fiber increases stiffness and response, delivering quicker acceleration and more powerful turns.
Do I need tools to install these fins?
No. These fins are FCS II compatible and install securely without tools.
This quad fin set combines the effortless glide of a traditional twin fish with the meticulous control of a performance quad. Designed for the experienced surfer and made from robust solid fiberglass with a machined finish, these fins provide instant responsiveness and fulfill the demanding performance standards of professional surfers. They blend the classic ease of a twin fish with the energetic performance of a quad setup.
✅ Good things about the DTR Quad Fin set
Speed / less drag / drive
The quad setup means you don’t have a large central fin dragging water, so you get smoother water flow and better acceleration.
Engineered to have a wider sweet spot.
The fins are built using a carbon interlayer, making them lightweight and responsive
Good drive and hold
The DTR quads are described as having the “drivey and basey feeling of a keel fin set” but in quad format.
Quads (in general) are praised for extra “grip” on the rail and better hold in sharper turns (especially when conditions are fast or steep).
Versatility especially in smaller / weaker waves
Because of the speed/drive advantage, quads can help you pick up speed in less powerful waves (weak surf) where a thruster might bog down.
The DTR quad works “in any quad fin board you put them in”
Improved turning / lively feel
You’ll get a more “skate-like” feel which many surfers like for fun boards or for boards meant to be more playful.
We include
Free Delivery: Everywhere in Australia.
Tracking: Quick & easy online tracking on all fins.
Peace of Mind: All our fins are insured against loss in transit.
Prompt Australian Dispatch: All items are sent from stock held in Sydney on the same or next business day.
Returns: 30-day, no questions asked returns, for unused full price items.
No More to Pay: No surcharges added at the checkout.
Express Shipping just $10 per order at checkout.