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The Xanadu Sea Thunder is a modern twin fin designed for intermediate to experienced surfers who want to blend old-school speed with new-school performance. Built to excel in waves from knee-high to head-high, this board brings radical maneuverability to everyday conditions without sacrificing glide or drive.
What sets the Sea Thunder apart is its finely tuned hydrodynamics. The board’s deck curve mirrors the bottom curve, reducing drag and enhancing speed by allowing water to flow without disruption. The refined foil features less foam in the nose and tail for added flex and a more responsive feel. The bottom contour starts with a roll vee up front, transitions through flat vee and single concave underfoot for drive, and finishes with a flat and roll vee off the tail—designed to enable sharp, arcing turns with control.
The tail is slightly narrower than a traditional fish, but still wide enough to glide easily in mushy conditions. Xanadu’s signature vee placement enhances pivot and drive off the tail, especially when paired with the recommended custom Xanadu twin fins for optimal performance.
Pros:
* Twin-fin speed with a responsive, modern feel
* Unique deck-to-bottom curve design reduces drag and boosts speed
* Narrower tail enhances control while maintaining glide
* Excellent for carving and stylish arcs in a variety of wave conditions
Cons:
* Not ideal for steep or hollow waves compared to a thruster
* Best performance relies on specific fin pairing (Xanadu fins sold separately)
Summary:
The Xanadu Sea Thunder is a refined twin-fin that combines retro-inspired flow with high-performance design details. From playful beach breaks to lined-up point waves, it offers the speed, responsiveness, and rail-to-rail freedom to surf fast and loose without compromise. If you're looking for a twin that can rip, not just cruise, the Sea Thunder is built for exactly that.