Sroka S-Foil 670 S HA 670 S HA hydrofoil front wing: 670 cm², 700 mm span, aspect ratio 7.50, with its closest equivalents from other brands within ±5% area and ±8% aspect ratio. Figures from Sroka'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 |
|---|---|---|---|---|---|---|---|
| Sabfoil | 707 Balz Muller Limited 707 Balz Müller Limited | 661 | -1.3% | 7.55 | +0.7% | 707 | C2 Mid-low aspect |
| GONG | Ypra Freestyle Micro V3 Atmo M | 660 | -1.5% | 7.40 | -1.3% | 700 | C2 Mid-low aspect |
| ENSIS | INFINITY ACE Front Wing 690 | 690 | +3.0% | 7.50 | +0.0% | 720 | C2 Mid-low aspect |
| Takuma | Kujira II Front Wing Kujira II 650 | 650 | -3.0% | 7.40 | -1.3% | 690 | C2 Mid-low aspect |
| Lift Foils | 105 Havoc Front Wing 105 | 677 | +1.0% | 7.20 | -4.0% | 699 | C2 Mid-low aspect |
| GONG | Ypra Freestyle V3 M | 680 | +1.5% | 7.80 | +4.0% | 730 | C2 Mid-low aspect |
| North | Sonar MA700v2 MA700v2 | 700 | +4.5% | 7.40 | -1.3% | 720 | C2 Mid-low aspect |
| KT Foiling | Halo 670 Halo 670 | 670 | +0.0% | 8.00 | +6.7% | 725 | C2 Mid-low aspect |
| Duotone | Carve 3.0 D/LAB 650 | 650 | -3.0% | 7.20 | -4.0% | 680 | C2 Mid-low aspect |
| Naish | Ultra Jet Front Wing Ultra Jet 650 | 650 | -3.0% | 7.11 | -5.2% | 680 | C2 Mid-low aspect |
| Unifoil | Aggression 105 Aggression 105 | 677 | +1.0% | 8.10 | +8.0% | 740 | C2 Mid-low aspect |
| Armstrong | MA Mk II (Mid Aspect) MA690 | 690 | +3.0% | 8.00 | +6.7% | 767 | C2 Mid-low aspect |
| GONG | Ascent V3 S | 690 | +3.0% | 7.00 | -6.7% | 690 | C2 Mid-low aspect |
| Cabrinha | Rebound 650 | 650 | -3.0% | 6.90 | -8.0% | 670 | C2 Mid-low aspect |
| F-One | SK8 HM Carbon (T2) SK8 HM CARBON 650 | 650 | -3.0% | 8.10 | +8.0% | 725 | C2 Mid-low aspect |
| RRD | Universal Mantaray Front Wing Y30 650 | 650 | -3.0% | 6.90 | -8.0% | 670 | C2 Mid-low aspect |
| GONG | Ypra Freestyle Micro V3 Atmo L | 700 | +4.5% | 7.00 | -6.7% | 700 | C2 Mid-low aspect |
| Family | S-Foil High Aspect (HA) |
|---|---|
| Size | 670 S HA |
| Area, cm² | 670 |
| Area basis | unknown |
| Span, mm | 700 |
| Chord, mm | 130 |
| Aspect ratio | 7.50 |
| Band | C2 Mid-low aspect |
| Brand files it under | Glide / high aspect |
| Disciplines | wing, race, kite, tow, sup, pump |
| Construction | high-modulus carbon (Carbon HM) |
| Model year | 2024-2026 |
| 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 Sroka 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.