Fast Bobby · Foilboards · Armstrong · discontinued

Armstrong Midlength FG 55L 5'5

Discontinuedsuperseded or no longer in the brand’s current range
55volume, L
1,651length, mm
457width, mm
3.61slenderness

Build hard Disciplines prone, wing discontinued

The Midlength FG has 7 sizes on record, discontinued sizes included, from 38 to 100 L. Its slenderness, 3.61, is greater than that of 78% of the 1,895 current boards that publish a length and a width.

Closest boards from other brands

Mount is shown beside each board, never matched on.

Current boards from other brands within ±7% of volume and ±2% of length, and ±2% of slenderness where both publish a width of the Armstrong Midlength FG 55L 5'5, closest first.
Brand	Board	Volume L	Δ volume	Length mm	Δ length	Slenderness	Mount
F-One	ROCKET FREE SURF 5'5	52	-5.5%	1,651	+0.0%	3.66 (+1.3%)	twin-track

Specifications

Every figure is Armstrong's own, read from the source linked in the last row, converted to millimetres and kilograms where the brand prints inches or pounds. Slenderness is computed here, length ÷ width.
Family	Midlength
Model	Midlength FG
Size, as the brand prints it	55L 5'5
Volume, L	55
Length, mm	1,651 (5'5")
Width, mm	457
Thickness, mm	105
Weight, kg	—
Slenderness (length ÷ width)	3.61
Slenderness band	3.0–4.0
Mount	—
Strap inserts	—
Build	hard
Construction	dual i-beam carbon stringers, carbon fiber foil tracks
Disciplines	prone, wing
Rider weight	—
Rider level	—
Model year	discontinued
Source	manufacturer · read 2026-10-02

Every figure above is the manufacturer's published claim, converted to comparable units.

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