5.2 and 4.35 inch Big Boy quad fins in black Pro Glass FCS compatible
Big Boy quad fin set showing oversized front and rear fins
5.2 and 4.35 inch Big Boy quad fins in black Pro Glass FCS compatible
Big Boy quad fin set showing oversized front and rear fins

5.2" / 4.35" Big Boy Quad Fins – Black Pro Glass (FCS Compatible, Set of 4).

$119.00

Built for power and control — Big Boy Quads deliver maximum drive and hold for bigger boards and stronger surfers.

Built for power and control — Big Boy Quads deliver maximum drive and hold for bigger boards and stronger surfers.

FCS compatible grub screws. FCS compatible grub screws. FCS compatible grub screws. FCS compatible grub screws. FCS compatible grub screws. FCS compatible grub screws. FCS compatible grub screws. FCS compatible grub screws.
FCS compatible grub screws.
from $2.70
Number of grub screws.:
Small Wax Comb with Integrated Fin Key.
Small Wax Comb with Integrated Fin Key.
$6.90

Front fins Depth 5.2” Base 5” Rear fins Depth 4.35” Base 4.35” Foil flat inner face on all fins.

The 5.2" / 4.35" Big Boy Quad Fins are designed for surfers who need extra fin area, stability, and drive without sacrificing speed. With oversized front fins to generate power and slightly smaller rear fins for controlled release, this quad set excels on wider-tailed boards, step-ups, and boards ridden with force.

Constructed from durable black Pro Glass, these fins offer a solid, dependable flex that holds firm under load and maintains control at higher speeds. The quad configuration delivers fast down-the-line acceleration with confident rail engagement, making this set ideal for surfers pushing harder through turns or riding boards that demand more fin.

Compatible with FCS fin systems, the Big Boy Quads are a reliable choice for everyday power surfing and larger conditions alike.

Key Features

  • Fin Type: Quad fin set

  • Front Fins: 5.2"

  • Rear Fins: 4.35"

  • Template: Big Boy (high-area, drive-focused design)

  • Construction: Black Pro Glass (fiberglass)

  • Flex Pattern: Medium-stiff for stability and control

  • Compatibility: FCS compatible

  • Set Includes: 4 fins (2 front + 2 rear)

Ideal For

  • Bigger surfers or powerful surfing styles

  • Wider-tailed shortboards and hybrids

  • Step-ups and boards needing extra hold

  • Medium to overhead surf conditions

Why Choose the Big Boy Quad Fins?

  • Increased fin area for maximum drive and hold

  • Stable, confidence-inspiring feel at speed

  • Durable Pro Glass construction for longevity

  • Quad setup delivers speed with added control

FAQs

Who are these fins best suited for?
They’re ideal for larger or stronger surfers, or anyone wanting more hold and control from their quad setup.

Will these fins feel too stiff?
Despite their size, the Pro Glass construction provides controlled flex, keeping the board responsive rather than rigid.

Will these fit my board?
Yes. These fins are compatible with standard FCS fin boxes.

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.