Side Bite 3.7 Hexcore
A 3.7" side bite pair in hexcore, FCS-compatible — the small outside fins that turn a single-fin board into a 2+1.
The Fin
A 3.7" side bite pair in hexcore, FCS-compatible — the small outside fins that turn a single-fin board into a 2+1.
Side bites convert a single-fin board into a 2+1: the centre fin still does the steering, and the two small fins add hold through a turn and drive off the bottom. The trade is some of the loose, pivoty feel a single fin has on its own, which is why size is the real decision.
This size
At 3.7" these sit in the middle, and are the size most people end up on. Noticeably more hold and drive than the 3.25", still short of locking the tail down.
Construction
Hexcore construction is lighter than solid glass and flexes more, which reads as a livelier, springier fin.
Specifications
The most popular side bite size for a longboard 2+1, adding real hold and drive without overpowering the center fin.
This is the pair most performance longboarders should start with: on a 9' to 9'6" log surfed aggressively, it lets you push hard into turns off the tail without washing out, catching you where a single fin would let go. If you are setting up a mid-length and want to preserve single-fin glide, get the subtler 3.25 instead, and drop your center fin to 7"–7.5" when you run these.
The True Ames Side Bite 3.7 is a 3.70" tall side bite pair in light Hexcore construction with FCS-compatible tabs, intended for longboard 2+1 setups. It carries more area than the 3.25 size and is typically run on 9' to 9'6" longboards alongside a 7" to 7.5" center fin. The same 3.7 template is also made in solid fiberglass and in a Futures-compatible version.
Mentioned in the review — Side Bite 3.25 · Side Bite 3.7 Solid Fiberglass (FCS) · Side Bite 3.7 Futures — not something we carry.