Compatibility comes first
Futures uses a single-tab base. FCS and FCS II use different twin-tab or click-in bases. A fin from one system cannot be treated as compatible with the other.
One Revolver Surfboards Resource Center
Find the right fins. Start with the right box.
Compatibility is locked first, setup is matched exactly, and then we rank the best live catalog options for your board, preferred feel, and rider size.
1
Which fin system is on your board?
Futures and FCS bases are not interchangeable. This first choice is a hard compatibility filter, not a ranking preference.
2
What board are you riding?
Board type does not override your selected setup. It only helps rank exact setup matches for the shape you ride.
3
Which exact setup do you need?
Setup matching is exact. A 5-fin set will never appear under Thruster, and a Twin + Trailer set will never appear under Twin.
4
How do you want the board to feel?
Feel ranks products only after compatibility and exact setup have passed. It can change order, never eligibility.
5
What is your rider size?
More rider weight usually needs more fin area for dependable hold. Product pages with size variants let you choose the final size.
Your top fin matches
Complete all five steps to see ranked recommendations.
Twin is not Twin + 1
A true twin or keel set contains two main fins. Twin + Trailer adds a small stabilizer and changes the board's release and control, so the selector keeps them separate.
Center-box sizing
Mid-length 2+1 boards often use roughly 6-8.5 inch centers; longboards commonly use 8-10.5 inches. Board length, tail width, and surfing style still matter.