FCS II MAYHEM DRIVER TRI FIN SET MEDIUM (NEW)
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Designed in collaboration with shaper and pro surfer Matt Biolos, the Mayhem Driver is a refined high-performance template built to perform across a wide range of boards—from elite performance models to everyday versatile boards like the RNF and Puddle Jumper.
Part of the Carver fin family, this elongated template features a wide base, curved trailing edge, and tapered tip, providing exceptional hold and control for powerful, drawn-out turns. Designed for surfers who like to carve and hack with precision, the Mayhem Driver excels in point breaks and hollow waves, helping you maintain drive through aggressive bottom turns while offering smooth, flowing transitions between maneuvers.
Featuring a new aesthetic and signature design, this fin combines power, stability, and responsiveness in one versatile high-performance template.
FEATURES & BENEFITS
- Designed in collaboration with Matt Biolos
- Wide base and tapered tipfor drive and control
- Elongated template for powerful, drawn-out turns
- Smooth transitions between turns for flowing performance
- Ideal for high-performance surfing and everyday versatility
PERFORMANCE FEEL
The Mayhem Driver provides powerful hold and smooth responsiveness.
The wide base generates strong drive off the bottom, while the tapered tip and curved trailing edge allow the fin to release cleanly through turns. Its elongated Carver-style template ensures stability and control in hollow waves and point-break conditions, making it ideal for surfers who want flowing carves and aggressive power turns.
The result is a fin that feels stable, fast, and precise, suitable for both performance-focused sessions and versatile everyday surfing.
FIN TEMPLATE: CARVER
Built for power, drive, and drawn-out turns.
The Carver template features anelongated outline with a high degree of sweep, allowing the board to hold its line through powerful bottom turns and extended carves.
This design generates exceptional hold and control, making it ideal for surfers who like to lean hard into turns and draw long, committed lines across the wave face.
IDEAL CONDITIONS: POINT BREAK
Performs particularly well in:
- Open-face waves
- Down-the-line point breaks
- Long, carving turns on clean walls
BOARD COMPATIBILITY
- Designed to fit the FCS II Fin System.
- Recommended for boards with deep concaves and moderate-to-extreme rocker

Volume Reference Guide
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| Weight | Beginner | Intermediate | Advanced | Pro |
|---|---|---|---|---|
|
80 lbs
36 kg
|
23.9L | 19.9L | 16.75L | 15.9L |
|
85 lbs
38.25 kg
|
24.4L | 20.7L | 17.4L | 16.6L |
|
90 lbs
40.50 kg
|
25.7L | 21.5L | 18L | 17.20L |
|
95 lbs
42.75 kg
|
26.5L | 22.1L | 18.5L | 17.7L |
|
100 lbs
45 kg
|
27.2L | 22.6L | 19L | 18.2L |
|
110 lbs
49.5 kg
|
29.2L | 24.4L | 20.5L | 19.5L |
|
120 lbs
54 kg
|
31L | 25.9L | 21.8L | 20.7L |
|
130 lbs
58.5 kg
|
31.8L | 26.5L | 22.3L | 21.2L |
|
140 lbs
63 kg
|
33.3L | 27.8L | 23.3L | 22.2L |
|
145 lbs
65.25 kg
|
34.5L | 28.8L | 24.2L | 23L |
|
150 lbs
67.5 kg
|
35.7L | 29.8L | 25L | 23.8L |
|
155 lbs
69.75 kg
|
36.9L | 30.8L | 25.8L | 24.6L |
|
160 lbs
72 kg
|
38.1L | 31.9L | 26.7L | 25.4L |
|
165 lbs
74.25 kg
|
39.3L | 32.8L | 27.5L | 26.2L |
|
170 lbs
76.5 kg
|
40.5L | 33.7L | 28.3L | 27L |
|
175 lbs
78.75 kg
|
41.7L | 34.7L | 29.2L | 27.8L |
|
180 lbs
81 kg
|
42.9L | 35.7L | 30L | 28.6L |
|
185 lbs
83.25 kg
|
44L | 36.7L | 30.9L | 29.4L |
|
190 lbs
85.5 kg
|
45.2L | 37.7L | 31.7L | 30.2L |
|
195 lbs
87.75 kg
|
46.4L | 38.7L | 32.5L | 31L |
|
200 lbs
90 kg
|
47.6L | 39.7L | 33.4L | 31.8L |
|
210 lbs
94.5 kg
|
50L | 41.7L | 35L | 33.4L |
|
220 lbs
99 kg
|
53.9L | 44.9L | 37.7L | 36L |
|
230 lbs
103.5 kg
|
57.9L | 48.2L | 40.5L | 38.6L |
|
240 lbs
108 kg
|
62L | 51.7L | 43.5L | 41.4L |
|
250 lbs
114 kg
|
66.1L | 55.2L | 46.5L | 44.2L |
|
260 lbs
118 kg
|
70.2L | 58.7L | 49.5L | 47L |
|
270 lbs
123 kg
|
75L | 62.7L | 53L | 49.8L |
Volumes are a general starting guide. Your ideal volume can shift based on board outline, fitness, wave conditions, and personal preference. Still unsure? Contact us and we'll help you dial it in.

