Mount twin-track Build hard Disciplines prone, wing 2020-2021
The Prone Foil has 3 sizes on record, discontinued sizes included, from 35 to 49 L. Its slenderness, 3.26, is greater than that of 64% 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 1.8× the tolerance.
| Brand | Board | Volume L | Δ volume | Length mm | Δ length | Slenderness | Mount |
|---|---|---|---|---|---|---|---|
| Jimmy Lewis | SuperFly FD 5'10" | 55 | +12.2% | 1,778 | -2.3% | 3.34 (+2.5%) | — |
| Amos | KrUzer V2 Regular 5'9" 20 7/8" 3 1/8" 50L | 50 | +2.0% | 1,753 | -3.7% | 3.31 (+1.8%) | twin-track |
| Amos | KrUzer V2 RTS Regular Reg 5'9" 20 7/8" 3 1/4" 50L (2" Recessed Tracks) | 50 | +2.0% | 1,753 | -3.7% | 3.31 (+1.6%) | twin-track |
| Family | Prone Foil |
|---|---|
| Model | Prone Foil |
| Size, as the brand prints it | 6'0" |
| Volume, L | 49 |
| Length, mm | 1,820 (6'0") |
| Width, mm | 559 |
| Thickness, mm | 78 |
| Weight, kg | 4.7 |
| Slenderness (length ÷ width) | 3.26 |
| Slenderness band | 3.0–4.0 |
| Mount | twin-track |
| Strap inserts | — |
| Build | hard |
| Construction | — |
| Disciplines | prone, wing |
| Rider weight | — |
| Rider level | — |
| Model year | 2020-2021 |
| Source | manufacturer · read 2026-10-02 |
Every figure above is the manufacturer's published claim, converted to comparable units.
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