Duotone Aero Free SLS 1250: a legacy wing, no longer in Duotone's current range. 1,250 cm², 900 mm span, aspect ratio 6.40. 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 |
|---|---|---|---|---|---|---|---|
| Axis | BSC (Broad Spectrum Carve) BSC 890 | 1,290 | +3.2% | 6.43 | +0.5% | 890 | C2 Mid-low aspect |
| North | Sonar MA1200v2 MA1200v2 | 1,200 | -4.0% | 6.40 | +0.0% | 875 | C2 Mid-low aspect |
| Cabrinha | Fusion X-Series MkII X1240 | 1,240 | -0.8% | 6.10 | -4.7% | 870 | C2 Mid-low aspect |
| ENSIS | PACER Front Wing 1250 | 1,250 | +0.0% | 6.00 | -6.3% | 864 | C1 Low aspect |
| RRD | Blaze LTE Front Wing Y30 1250 | 1,250 | +0.0% | 6.00 | -6.3% | 865 | C1 Low aspect |
| Axis | PNG (Pump and Glide) PNG 910 | 1,267 | +1.4% | 6.80 | +6.2% | 910 | C2 Mid-low aspect |
| Lift Foils | 200 Havoc LCS Front Wing 200 | 1,290 | +3.2% | 6.10 | -4.7% | 889 | C2 Mid-low aspect |
| Axis | SP (Surf Performance) SP 860 | 1,293 | +3.4% | 6.10 | -4.7% | 860 | C2 Mid-low aspect |
| Sabfoil | Leviathan 950 Leviathan 950 | 1,300 | +4.0% | 6.68 | +4.4% | 950 | C2 Mid-low aspect |
| F-One | PHANTOM Carbon PHANTOM 1280 | 1,280 | +2.4% | 5.90 | -7.8% | 870 | C1 Low aspect |
| Family | Aero Free |
|---|---|
| Size | 1250 |
| Area, cm² | 1,250 |
| Area basis | unknown |
| Span, mm | 900 |
| Chord, mm | — |
| Aspect ratio | 6.40 |
| Band | C2 Mid-low aspect |
| Brand files it under | All-round / freeride |
| Disciplines | wing |
| Construction | SLS |
| Model year | 2024 |
| Source | manufacturer |
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.