4.9" / 3.1" RM Quad Fins – Natural Pro Glass (FCS Compatible, Set of 4).

Front fins Depth 4.9” Base 5.67” Rear fins Depth 3.1” Base 4.13” Foil: all four fins flat inner face.

The 4.9" / 3.1" RM Quad Fins are designed to provide a powerful blend of speed, drive, and hold, making them an excellent choice for surfers who want quad acceleration without sacrificing flow. The larger front fins generate strong drive and projection, while the smaller rear fins add control and smooth release through turns.

Constructed from natural Pro Glass, these fins offer a slightly heavier, dampened feel that smooths out chatter and enhances control, particularly in cleaner or more open wave faces. The RM template is well suited to surfers who draw longer lines and rely on rail engagement rather than abrupt pivots.

Compatible with FCS fin systems, this quad set performs across a wide range of conditions — from punchy beach breaks to clean points — and suits both performance shortboards and wider-tailed hybrids.

Key Features

• Fin Type: Quad fin set

• Front Fins: 4.9"

• Rear Fins: 3.1"

• Template: RM (drive-focused, smooth-release design)

• Construction: Natural Pro Glass (fiberglass)

• Flex Pattern: Medium, smooth, and controlled

• Compatibility: FCS compatible

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

Ideal For

• Quad-fin shortboards and hybrids

• Surfers seeking speed and down-the-line drive

• Small to overhead surf conditions

• Beach breaks, reefs, and point waves

Why Choose the RM Quad Fins?

• Strong acceleration with excellent hold

• Smooth rail-to-rail transitions

• Natural Pro Glass provides classic feel and durability

• Versatile quad setup for everyday performance

FAQs

What does the different front and rear fin size do?
The larger front fins generate drive and speed, while the smaller rear fins add control and allow smoother release through turns.

Are these fins suitable for everyday surfing?
Yes. The balanced RM quad template makes them ideal for daily use across varied wave conditions.

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.