The FCS II Mayhem Medium Thruster Surfboard Fins are the signature design from ...Lost shaper Matt “Mayhem” Biolos, delivering the perfect balance of drive, control, and release. Featuring a neutral template with a wide base, these fins provide extra power and hold through hard, arcing turns while maintaining speed and maneuverability. Built with Performance Core Carbon (PCC) construction, they offer rapid acceleration and a lively, responsive feel underfoot—perfect for performance shortboards in all conditions.
Key Features
Matt “Mayhem” Biolos Signature Design: Created by the legendary ...Lost shaper for high-speed, progressive surfing.
Neutral Template with Wide Base: Generates extra drive and hold through carves while maintaining agility.
Performance Core Carbon (PCC) Construction: Lightweight, stiff flex pattern that enhances speed and control.
Balanced Feel: Blends drive, stability, and release for reliable performance across wave types.
FCS II Tool-Less System: No screws or keys required—snap fins in or out for quick setup changes.
Medium Thruster Set: Ideal for medium-weight surfers seeking power and precision in turns.
Why Choose the FCS II Mayhem Fins?
The FCS II Mayhem Fins are engineered for surfers who want control and speed through powerful turns. With their carbon-reinforced construction and wide-base template, they provide explosive acceleration and a clean, predictable release. Whether carving through open faces or attacking steep pockets, this set delivers the drive and response needed for performance surfing.
Charge hard and surf fast with the FCS II Mayhem Medium Thruster Surfboard Fins—a refined, high-performance fin set designed by Matt Biolos for power and precision.
Orders over $75 within the Continental USA qualify for free shipping. This excludes surfboards, skateboards, surfboard bags, and other oversized items.
Oversized Items
Oversized items like surfboards and certain skateboard items do not qualify for free shipping. Shipping rates for these items are calculated live in the cart or at checkout based on their size and weight.
Surfboards Under 5'11" and 21" Wide
Surfboards under 5'11" in length and 21" in width can ship via standard UPS without an additional surcharge. Live shipping rates are quoted in the cart or at checkout, offering an accurate cost based on the shipping destination.
Surfboards Over 5'11" or 21" Wide
Surfboards over 5'11" in length or wider than 21" are considered oversized by UPS and incur a UPS Oversize Package surcharge of $160-$235, in addition to the standard shipping cost. This fee is quoted live in the cart or at checkout. Rider Shack does not control these UPS-imposed fees.
Surfboards Over 8'
Surfboards longer than 8' exceed standard UPS shipping size limits and cannot be shipped via UPS. These are available for in-store pickup or airport pickup, with the latter option typically costing around $200. For airport pickup arrangements, please contact us directly for a personalized quote.
