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

5.2" / 4.35" Big Boy Quads, black Pro Glass. FCSII compatible set of four fins.

$119.00

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

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

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Colour:

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 engineered for surfers who demand extra fin area, stability, and drive without losing speed. Featuring oversized front fins for powerful projection and slightly smaller rear fins for controlled release, this quad set is ideal for boards that need more hold under load.

Constructed from durable black Pro Glass, these fins provide a dependable, medium-stiff flex that holds firm through hard turns and higher speeds. The quad configuration generates fast down-the-line acceleration while maintaining excellent rail engagement and confidence in steeper sections.

Designed to be FCS II compatible, these fins install tool-free, making it easy to fine-tune your setup between sessions.

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 power and control

  • Compatibility: FCS II compatible

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

Ideal For

  • Bigger or more powerful surfers

  • 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 stability

  • Confident, locked-in feel at speed

  • Durable Pro Glass construction built to last

  • Tool-free FCS II installation for convenience

FAQs

Who should use Big Boy quad fins?
They’re ideal for larger surfers or anyone wanting more hold and drive from their quad setup.

Will these fins feel too stiff?
The Pro Glass construction provides controlled flex, maintaining responsiveness while offering stability.

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

Enjoy faster Express Shipping for just $10 per order at checkout.