Fast Bobby · Foilboards · Infinity · discontinued

Infinity Spy v 4.10 X 21 49L

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Disciplines prone, tow

The Spy v Spy has 5 sizes on record, discontinued sizes included, from 29 to 49 L. Its slenderness, 2.76, is greater than that of 38% 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 Infinity Spy v 4.10 X 21 49L, closest first.
BrandBoardVolume LΔ volumeLength mmΔ lengthSlendernessMount
AppletreeApple Skipper Wing 4'9'' (50L)50+2.0%1,448-1.7%2.78 (+0.6%)twin-track
GONGSurf Foil Board Matata FSP Pro 2026 4'947-4.1%1,448-1.7%2.73 (-1.1%)twin-track
KT FoilingGinxu 2 Pro Carbon 4646-6.1%1,473+0.0%2.80 (+1.1%)twin-track

Specifications

Every figure is Infinity'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.
FamilySpy vs Spy
ModelSpy v Spy
Size, as the brand prints it4.10 X 21 X 49L
Volume, L49
Length, mm1,473 (4'10")
Width, mm533
Thickness, mm—
Weight, kg—
Slenderness (length ÷ width)2.76
Slenderness band2.5–3.0
Mount—
Strap inserts—
Build—
Construction—
Disciplinesprone, tow
Rider weight—
Rider level—
Model year—
Sourcemanufacturer · read 2026-10-02

The source is an archived copy of Infinity's own page, captured 2024-06-23, not a live page: these figures are as that copy prints them.

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

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