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The Fin
Side Bite 4.0 - FCS Compatible, Solid Fiberglass (2 Fin Set). A classic 4.0" side-bite set meant to pair with a center fin in 2+1 configurations, adding an extra level of stability, projection, and hold when the board is put on rail. The all-around template and flat inside foil deliver dependable performance across many board styles and wave types, from performance longboards to mid-lengths. Solid fiberglass construction provides durability, consistent flex, and a positive, planted feel underfoot.
Specifications
ConfigurationSide bites — pair
Base3.9"
Depth4"
Made byTrue Ames, Santa Barbara CA
Sizes4.0
Colors4 options
Price Range$73.75
AvailabilityIn Stock
From True Ames
The heavy-duty end of the side bite line: the extra height and base over the 3.7 put more fin in the water on rail, with appreciably more hold than the smaller sizes.
Our take
Run these on a performance log or large 2+1 board in steep, powerful surf where a single fin gives up the tail — they push the board toward thruster-like drive rather than just adding a safety net. Size the center fin down so the board still turns, and for cleaner small-wave days or a more single-fin feel, step down to the 3.7 or 3.25.
More About This Fin
The Side Bite 4.0 Fiberglass is a 4.0" side bite set sold as a pair in solid fiberglass with FCS-compatible bases. It sits near the top of the True Ames side bite range, just under the 4.35, with more height and base than the 3.7. It is intended for 2+1 longboard setups paired with a center fin of roughly 6.5 to 7 inches, and the same size is also offered in lighter Hexcore construction.
Similar Fins
Mentioned in the review — Side Bite 3.7 (FCS) · Side Bite 3.25 (FCS) · Side Bite 4.0 (FCS, Hexcore) — not something we carry.