Sheet updated September 2026
The Set of 4 S-Bend Glass 15 FS 4.5 fins completely re-equips a Duotone twintip, including screws and rail nuts. Four 4.5 cm S-Bend fins in Glass 15 construction, black color. Replace all four together: three worn fins and one new one means a board that doesn't grip the same on both sides.
KEY INFORMATION
SET OF 4 S-BEND GLASS 15 FS 4.5 FINS - Duotone Kite Spare Part
What we like
- The complete set: Four fins, and the board is re-equipped in one go.
- Screws included: The screws and rail nuts are in the box, no need to order anything separately.
- S-Bend profile: The fin design originally mounted by Duotone on its twintips.
- 4.5 cm: The intermediate height: enough grip to hold your course, short enough to remain free for sliding.
- Black color: The discreet finish that won't clash with any deck.
Included / Not included
✔️ Included: 4 S-Bend Glass 15 FS 4.5 cm fins, Mounting screw set, Rail nuts
❌ Not included: Board, Mounting key
DETAILED DESCRIPTION
What a new fin changes
A fin wears down at the Leading Edge, which gradually rounds off. This causes a progressive loss of grip, and riders often compensate without realizing it until their board stalls upwind or slides out on landing. A new set restores your board's original performance, and you'll feel the difference from your very first run.
Why all four at once
A twintip's four fins work together, with two at the front and two at the back, depending on your riding direction. They wear at the same rate but not always in the same way, depending on the conditions you encounter. Replacing them all at once is the only way to ensure consistent grip on both sides of your board.
FAQ - SET OF 4 S-BEND GLASS 15 FS 4.5 FINS
Yes, the screws and rail nuts are in the box.
That depends on the spacing of your board's inserts. Tell us your model, and we'll check before you order.
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