Duotone, 2025

Skate SLS 2025

2160mm long · 7'1"

620mm wide

≈ 121mm thick · estimated

91litres

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 forward. A pin tail, a medium nose and gently curved rails.

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

As listed by Duotone

Duotone Skate SLS 2025: every size as listed by Duotone
size	length	width	thickness	weight
86 L	214 cm · 2140 mm	595 mm	≈ 120 mm · estimated	6.1 kg
91 L	216 cm · 2160 mm	620 mm	≈ 121 mm · estimated	6.2 kg
99 L	220 cm · 2200 mm	650 mm	≈ 123 mm · estimated	6.4 kg
107 L	224 cm · 2240 mm	660 mm	≈ 129 mm · estimated	6.7 kg

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

Next to your board?

Lay the Duotone Skate SLS 91 L over up to four others, at one scale.

Compare with…

Shape & Rocker

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

Read off the 86 L outline · derived

57 %wide point, 1224 mm from the tail

3.60length over width

399mm wide 12″ from the tail

10,002cm² of planform

Read off the 91 L outline · derived

57 %wide point, 1236 mm from the tail

3.48length over width

414mm wide 12″ from the tail

10,516cm² of planform

Read off the 99 L outline · derived

57 %wide point, 1258 mm from the tail

3.38length over width

431mm wide 12″ from the tail

11,232cm² of planform

Read off the 107 L outline · derived

57 %wide point, 1281 mm from the tail

3.39length over width

434mm wide 12″ from the tail

11,613cm² of planform

Rocker of the 86 L · scaled from the 91 L measured

≈ 22 mmtail rocker, at the tip

≈ 15 mm12″ from the tail

≈ 34 mm12″ from the nose

≈ 108 mmnose rocker, at the tip

≈ 588 mmflat to within 3 mm, from 36 % to 63 % of the length

48 %of the length to the lowest point, from the tail

≈ 120 mmat its thickest, 46 % from the tail

≈ 27 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 91 L · measured

≈ 23 mmtail rocker, at the tip

≈ 15 mm12″ from the tail

≈ 34 mm12″ from the nose

≈ 109 mmnose rocker, at the tip

≈ 591 mmflat to within 3 mm, from 36 % to 63 % of the length

48 %of the length to the lowest point, from the tail

≈ 121 mmat its thickest, 46 % from the tail

≈ 27 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 99 L · scaled from the 91 L measured

≈ 23 mmtail rocker, at the tip

≈ 16 mm12″ from the tail

≈ 36 mm12″ from the nose

≈ 111 mmnose rocker, at the tip

≈ 597 mmflat to within 3 mm, from 36 % to 63 % of the length

48 %of the length to the lowest point, from the tail

≈ 123 mmat its thickest, 46 % from the tail

≈ 28 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 107 L · scaled from the 91 L measured

≈ 24 mmtail rocker, at the tip

≈ 16 mm12″ from the tail

≈ 37 mm12″ from the nose

≈ 114 mmnose rocker, at the tip

≈ 603 mmflat to within 3 mm, from 36 % to 63 % of the length

48 %of the length to the lowest point, from the tail

≈ 129 mmat its thickest, 46 % from the tail

≈ 28 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 Skate SLS 98 (Duotone′s 99 L size), scaled as the 91 L though the rail reads the 99 L (not rescaled yet). Tail end set by Claude, not checked by a person. · estimated