Disciplines wing, parawing, downwind, sup
The Beluga FL Black Line Y31 has 5 sizes in the current range, from 95 to 145 L. Its slenderness, 3.58, is greater than that of 78% 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 1.4× the tolerance.
| Brand | Board | Volume L | Δ volume | Length mm | Δ length | Slenderness | Mount |
|---|---|---|---|---|---|---|---|
| Armstrong | Midlength Mk II X-Form 115L 6'11'' | 115 | -8.0% | 2,108 | -2.0% | 3.65 (+1.8%) | — |
| JP Australia | M-Winger 120 | 120 | -4.0% | 2,130 | -0.9% | 3.67 (+2.5%) | twin-track |
| JP Australia | M-Winger 135 | 135 | +8.0% | 2,210 | +2.8% | 3.62 (+1.1%) | twin-track |
| Family | Beluga FL |
|---|---|
| Model | Beluga FL Black Line Y31 |
| Size, as the brand prints it | 125 |
| Volume, L | 125 |
| Length, mm | 2,150 (7'1") |
| Width, mm | 600 |
| Thickness, mm | — |
| Weight, kg | 7.1 |
| Slenderness (length ÷ width) | 3.58 |
| Slenderness band | 3.0–4.0 |
| Mount | — |
| Strap inserts | yes |
| Build | — |
| Construction | BLACK Line: precision-molded Super EPS core (18 kg/m3), HEXAgonal Innegra Carbon deck (176 g/m2), 110 g biaxial carbon bottom |
| Disciplines | wing, parawing, downwind, sup |
| Rider weight | — |
| Rider level | — |
| Model year | — |
| Source | manufacturer · read 2026-10-02 |
Every figure above is the manufacturer's published claim, converted to comparable units.