5.4" Big Boy Thruster Fins – Black Pro Glass

Futures compatible. Depth 5.4” Base 4.6” Foil: Side fins flat inner face, Centre fin 50/50 Futures compatible tab size: Side fins 3/4” Centre fin 1/2”

The 5.4" Big Boy Thruster Fins are designed to provide increased drive, stability, and control for surfers who benefit from a larger fin template. With added base area and surface compared to standard thruster fins, this set delivers stronger down-the-line projection and dependable hold through committed turns.

Constructed from black Pro Glass, these fins offer a consistent flex pattern and long-term durability. The template suits boards that need extra fin engagement, making them well-matched to higher-volume shortboards, step-ups, and everyday performance boards ridden by heavier or more powerful surfers.

Key Features

• 5.4" Big Boy thruster fin template

• Larger base and surface area for increased drive

• Pro Glass construction for strength and predictable flex

• Neutral foil for balanced speed and control

• Black finish with visible fiberglass weave

• Set of three fins for thruster configurations

Ideal For

• Bigger or more powerful surfers

• Shortboards with added volume or width

• Step-up boards and everyday performance boards

• Surfers seeking extra hold and drive

• Medium to solid surf conditions

Why Choose This Product

Larger fin templates play a critical role in controlling higher loads. The 5.4" Big Boy Thruster Fins provide added fin engagement without making boards feel stiff or locked-in. Pro Glass construction ensures consistent flex and durability, offering a reliable setup for surfers who need more fin underfoot to match their size, power, or board choice.

Compatibility

• Futures fin system compatible

• Designed for thruster (three-fin) setups

• Requires Futures fin boxes

• Not compatible with sliding center fin boxes

Frequently Asked Questions

Who are Big Boy thruster fins designed for?
They are designed for surfers who benefit from a larger fin, including heavier riders, powerful surfers, or boards with increased volume.

Will these fins feel stiff compared to standard thruster fins?
No. While the template provides more hold and drive, Pro Glass construction maintains a smooth, predictable flex.

Can these fins be used in small surf?
Yes. They work well in small to medium surf, particularly on boards that feel under-finned with standard thruster templates.

This 5.4" Big Boy Thruster Fin set – Black Pro Glass is designed to increase drive, stability, and control for larger surfers and higher-volume boards, using durable Pro Glass construction to deliver predictable flex and reliable fin engagement. Ideal for thruster shortboards and step-up designs, it provides strong hold and confident projection without unnecessary complexity. Compatible with Futures fin systems, it is a dependable option for surfers seeking balanced performance and consistency.

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.