Disciplines prone
The Dolphin Orange Line Y31 has 2 sizes in the current range, from 25 to 35 L. Its slenderness, 3.00, is greater than that of 53% of the 1,895 current boards that publish a length and a width.
Mount is shown beside each board, never matched on.
| Brand | Board | Volume L | Δ volume | Length mm | Δ length | Slenderness | Mount |
|---|---|---|---|---|---|---|---|
| Amos | KrUzer RTS Prone 4'5" 17 3/4" 3 1/2" 24.5L | 24.5 | -2.0% | 1,346 | -0.3% | 2.98 (-0.5%) | twin-track |
| Family | Dolphin |
|---|---|
| Model | Dolphin Orange Line Y31 |
| Size, as the brand prints it | 25 |
| Volume, L | 25 |
| Length, mm | 1,350 (4'5") |
| Width, mm | 450 |
| Thickness, mm | 70 |
| Weight, kg | 3.5 |
| Slenderness (length ÷ width) | 3.00 |
| Slenderness band | 2.5–3.0 |
| Mount | — |
| Strap inserts | yes |
| Build | — |
| Construction | ORANGE Line: precision-molded Super EPS core (20 kg/m3), full 160 g/m2 fiberglass deck and bottom |
| Disciplines | prone |
| 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.