Build hard Disciplines windfoil, race 2024-2025
The X-15 Windfoil has 6 sizes on record, discontinued sizes included, from 150 to 177 L. Its slenderness, 2.53, is greater than that of 21% of the 1,895 current boards that publish a length and a width.
No current board from another brand is within ±7% of volume and ±2% of length, and ±2% of slenderness where both publish a width of this one.
None of these is within the tolerances above: each misses on volume, length or slenderness by up to 2.2× the tolerance.
| Brand | Board | Volume L | Δ volume | Length mm | Δ length | Slenderness | Mount |
|---|---|---|---|---|---|---|---|
| F-One | ROCKET AIR 7'2 | 190 | +7.3% | 2,180 | -3.1% | 2.53 (+0.3%) | twin-track |
| RRD | H-Fire Pro 91 LTD Y25 | 155 | -12.4% | 2,250 | +0.0% | 2.47 (-2.2%) | tuttle |
| JP Australia | HydroFoil 155 (Wood Pro) | 155 | -12.4% | 2,150 | -4.4% | 2.42 (-4.4%) | tuttle |
| Family | X-15 Windfoil |
|---|---|
| Model | X-15 Windfoil |
| Size, as the brand prints it | X-15 89 |
| Volume, L | 177 |
| Length, mm | 2,250 (7'5") |
| Width, mm | 890 |
| Thickness, mm | 145 |
| Weight, kg | 9.6 |
| Slenderness (length ÷ width) | 2.53 |
| Slenderness band | 2.5–3.0 |
| Mount | — |
| Strap inserts | — |
| Build | hard |
| Construction | Carbon Reflex Sandwich |
| Disciplines | windfoil, race |
| Rider weight | — |
| Rider level | — |
| Model year | 2024-2025 |
| Source | manufacturer · read 2026-10-02 |
Every figure above is the manufacturer's published claim, converted to comparable units.
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