Duotone, 2025

Viper HD (SB, incl. fin) 2025

3000mm long · 9'10"

870mm wide

≈ 196mm thick · estimated

240litres

Open in Studio See it on duotonesports.com

Sizes & Numbers

Listed by the brand, read off a photo, or worked out: where every number comes from

In one line

Its width sits further back. A square tail, a full nose and parallel rails.

derived · against the 104 other windsurf boards in the atlas, read off the outlines.

As listed by Duotone

Duotone Viper HD (SB, incl. fin) 2025: every size as listed by Duotone
size	length	width	thickness	weight
180 L	254 cm · 2540 mm	760 mm	≈ 199 mm · estimated	13 kg
210 L	284 cm · 2840 mm	840 mm	≈ 187 mm · estimated	14.8 kg
240 L	300 cm · 3000 mm	870 mm	≈ 196 mm · estimated	16.2 kg

Every size side by side, tails on one line, one scale

Next to your board?

Lay the Duotone Viper HD (SB, incl. fin) 240 L over up to four others, at one scale.

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Shape & Rocker

From above, then from the side, true scale · the chosen size solid, the others dashed

Read off the 180 L outline · derived

50 %wide point, 1270 mm from the tail

3.34length over width

523mm wide 12″ from the tail

16,069cm² of planform

Read off the 210 L outline · derived

50 %wide point, 1420 mm from the tail

3.38length over width

559mm wide 12″ from the tail

19,858cm² of planform

Read off the 240 L outline · derived

50 %wide point, 1500 mm from the tail

3.44length over width

571mm wide 12″ from the tail

21,786cm² of planform

Rocker of the 180 L · scaled from the 240 L, estimated

≈ 65 mmtail rocker, at the tip

≈ 35 mm12″ from the tail

≈ 55 mm12″ from the nose

≈ 155 mmnose rocker, at the tip

≈ 372 mmflat to within 3 mm, from 51 % to 66 % of the length

59 %of the length to the lowest point, from the tail

≈ 199 mmat its thickest, 60 % from the tail

≈ 51 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 210 L · scaled from the 240 L, estimated

≈ 74 mmtail rocker, at the tip

≈ 42 mm12″ from the tail

≈ 67 mm12″ from the nose

≈ 174 mmnose rocker, at the tip

≈ 383 mmflat to within 3 mm, from 52 % to 65 % of the length

59 %of the length to the lowest point, from the tail

≈ 187 mmat its thickest, 60 % from the tail

≈ 57 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 240 L · estimated

≈ 78 mmtail rocker, at the tip

≈ 46 mm12″ from the tail

≈ 74 mm12″ from the nose

≈ 185 mmnose rocker, at the tip

≈ 389 mmflat to within 3 mm, from 52 % to 65 % of the length

59 %of the length to the lowest point, from the tail

≈ 196 mmat its thickest, 60 % from the tail

≈ 60 mmlonger along the bottom curve than flat

Lay this rocker over other boards

True proportions · dots at 10 mm and 12″ in from each tip · bracket: flat to within 3 mm · On Duotone's photo of the 240 L, which shows the Viper HD, where its traced side holds 35 % more than the listed 240 L: probably shot from slightly above. Tail end set by rule. · estimated