JP Australia, 2024

GT-S Biax 2024

3810mm long · 12'6"

740mm wide

≈ 218mm thick · estimated

287litres

Open in Studio See it on jp-australia.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 rounded pin tail, a pointed nose and curvy rails.

derived · against the 303 other sup boards in the atlas, read off the outlines.

As listed by JP Australia

JP Australia GT-S Biax 2024: every size as listed by JP Australia
size	length	width	thickness	weight
287 L	381 cm · 3810 mm	740 mm	≈ 218 mm · estimated	14.7 kg
309 L	426 cm · 4260 mm	740 mm	≈ 210 mm · estimated	16.2 kg

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

Next to your board?

Lay the JP Australia GT-S Biax 287 L over up to four others, at one scale.

Compare with…

Generations

After it · 2025

The 2025 287 L is the same length and width as the 2024 287 L. Open the 2025

listed length and width

2024 287 L 2025 287 L

The JP Australia GT-S Biax over time

Shape & Rocker

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

Read off the 287 L outline · derived

28 %wide point, 1066 mm from the tail

5.08length over width

516mm wide 12″ from the tail

21,502cm² of planform

Read off the 309 L outline · derived

28 %wide point, 1192 mm from the tail

5.76length over width

479mm wide 12″ from the tail

23,702cm² of planform

Rocker of the 287 L · estimated

≈ 91 mmtail rocker, at the tip

≈ 55 mm12″ from the tail

≈ 27 mm12″ from the nose

≈ 70 mmnose rocker, at the tip

≈ 791 mmflat to within 3 mm, from 43 % to 64 % of the length

50 %of the length to the lowest point, from the tail

≈ 218 mmat its thickest, 62 % from the tail

≈ 41 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 309 L · scaled from the 287 L, estimated

≈ 103 mmtail rocker, at the tip

≈ 65 mm12″ from the tail

≈ 31 mm12″ from the nose

≈ 79 mmnose rocker, at the tip

≈ 836 mmflat to within 3 mm, from 44 % to 63 % of the length

50 %of the length to the lowest point, from the tail

≈ 210 mmat its thickest, 62 % from the tail

≈ 46 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 JP Australia's photo of the 287 L, where its traced side holds 27 % more than the listed 287 L: probably shot from slightly above. Tail end set by rule. · estimated