Duotone Spirit Surf 1500 1500: a legacy wing, no longer in Duotone's current range. 1,500 cm², 844 mm span, aspect ratio 4.75. The current wings that match it within ±5% area and ±8% aspect ratio, from Duotone's own published specifications.
Projected and flat area run 3–8% apart. A marked area is one whose brand does not state which it publishes, so a match inside the area tolerance may be comparing unlike figures.
| Brand | Wing | Area cm² | Δ area | Aspect ratio | Δ AR | Span mm | Band |
|---|---|---|---|---|---|---|---|
| Slingshot | One-Lock Ease 1550 | 1,550 | +3.3% | 4.80 | +1.1% | 866 | C1 Low aspect |
| Family | Spirit Surf |
|---|---|
| Size | 1500 |
| Area, cm² | 1,500 |
| Area basis | unknown |
| Span, mm | 844 |
| Chord, mm | 214 |
| Aspect ratio | 4.75 |
| Band | C1 Low aspect |
| Brand files it under | Surf / carve |
| Disciplines | kite, wing, prone |
| Construction | carbon |
| Model year | 2020 |
| Source | retailer |
The brand's published aspect ratio agrees with its own span and area (span² ÷ area) to within 5%, so the figure is confirmed.
See Duotone on the plot →Data current to August 2026. Fast Bobby is the researcher, never the reviewer: every figure above is the manufacturer's published claim, converted to comparable units, and nothing here is a riding impression.