Firewire, 2026

Firewire Sweet Potato 2026

1676mm long · 5'6"

559mm wide

65mm thick

37.8litres

See similar boards

Open in Studio See it on firewiresurfboards.com

Sizes & Numbers

Listed by the brand, read off a photo, or worked out

In one line

Shorter and fuller than most. A swallow tail, a medium nose and gently curved rails.

derived · against the 146 other surf boards in the atlas, read off the outlines.

As listed by Firewire

Firewire Sweet Potato 2026: every size as listed by Firewire
size	length	width	thickness	weight	price
31 L	5'2" · 1575 mm	545 mm	59 mm	–	US$995
34.6 L	5'4" · 1626 mm	551 mm	62 mm	–	US$995
37.8 L	5'6" · 1676 mm	559 mm	65 mm	–	US$995
41.4 L	5'8" · 1727 mm	567 mm	68 mm	–	US$995
45.2 L	5'10" · 1778 mm	572 mm	71 mm	–	US$1,125
49 L	6'0" · 1829 mm	578 mm	76 mm	–	US$1,125
52.2 L	6'2" · 1880 mm	584 mm	78 mm	–	US$1,125
57.1 L	6'4" · 1930 mm	587 mm	83 mm	–	US$1,125

Prices as the Firewire store showed them on 2026-10-27, in its currency · the cheapest version first, every version on hover

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

Which Sweet Potato Size for Your Weight?

The Firewire Sweet Potato 2026 size each rider would pick, by weight and level

Your weight

kg≈ 165 lb

Your level

75 kg · getting there · look for 33.8–41.3 L

The Sweet Potato 37.8 L

2 sizes fall in your range; the 37.8 L is nearest its middle.

Other boards for you

A rule of thumb (0.45 to 0.55 L per kg you weigh), not Firewire’s chart

Every weight and level

Firewire Sweet Potato 2026: the size for a rider of 60 to 105 kg, by level
level	60 kg	75 kg	90 kg	105 kg
First sessions0.6 to 0.9 L per kg you weigh	45.2 L	57.1 L	57.1 L	57.1 L · small
Getting there0.45 to 0.55 L per kg you weigh	31 L	37.8 L	45.2 L	52.2 L
Confident0.38 to 0.45 L per kg you weigh	too big	31 L	37.8 L	45.2 L
Expert0.33 to 0.38 L per kg you weigh	too big	31 L · big	31 L	37.8 L

Rules of thumb, not Firewire’s chart · “small” and “big”: the nearest size, just outside the range · How the sizes are worked out · Find your board

Next to your board?

Lay the Firewire Sweet Potato 37.8 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 31 L outline · derived

50 %wide point, 779 mm from the tail

2.89length over width

460mm wide 12″ from the tail

6,965cm² of planform

Read off the 34.6 L outline · derived

50 %wide point, 804 mm from the tail

2.95length over width

460mm wide 12″ from the tail

7,274cm² of planform

Read off the 37.8 L outline · derived

50 %wide point, 829 mm from the tail

3.00length over width

463mm wide 12″ from the tail

7,609cm² of planform

Read off the 41.4 L outline · derived

50 %wide point, 855 mm from the tail

3.05length over width

464mm wide 12″ from the tail

7,950cm² of planform

Read off the 45.2 L outline · derived

50 %wide point, 880 mm from the tail

3.11length over width

464mm wide 12″ from the tail

8,253cm² of planform

Read off the 49 L outline · derived

50 %wide point, 905 mm from the tail

3.16length over width

465mm wide 12″ from the tail

8,584cm² of planform

Read off the 52.2 L outline · derived

50 %wide point, 930 mm from the tail

3.22length over width

465mm wide 12″ from the tail

8,919cm² of planform

Read off the 57.1 L outline · derived

50 %wide point, 955 mm from the tail

3.29length over width

464mm wide 12″ from the tail

9,210cm² of planform

Rocker of the 31 L · scaled from the 37.8 L measured

47 mmtail rocker, at the tip

15 mm12″ from the tail

16 mm12″ from the nose

75 mmnose rocker, at the tip

435 mmflat to within 3 mm, from 36 % to 64 % of the length

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

65 mmat its thickest, 47 % from the tail

13 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 34.6 L · scaled from the 37.8 L measured

48 mmtail rocker, at the tip

16 mm12″ from the tail

17 mm12″ from the nose

78 mmnose rocker, at the tip

443 mmflat to within 3 mm, from 37 % to 64 % of the length

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

68 mmat its thickest, 47 % from the tail

13 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 37.8 L · measured

50 mmtail rocker, at the tip

17 mm12″ from the tail

19 mm12″ from the nose

81 mmnose rocker, at the tip

450 mmflat to within 3 mm, from 37 % to 64 % of the length

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

72 mmat its thickest, 47 % from the tail · on the photo; Firewire lists 65 mm

14 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 41.4 L · scaled from the 37.8 L measured

51 mmtail rocker, at the tip

19 mm12″ from the tail

20 mm12″ from the nose

83 mmnose rocker, at the tip

457 mmflat to within 3 mm, from 37 % to 64 % of the length

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

75 mmat its thickest, 47 % from the tail

14 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 45.2 L · scaled from the 37.8 L measured

53 mmtail rocker, at the tip

20 mm12″ from the tail

22 mm12″ from the nose

86 mmnose rocker, at the tip

464 mmflat to within 3 mm, from 37 % to 63 % of the length

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

79 mmat its thickest, 47 % from the tail

15 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 49 L · scaled from the 37.8 L measured

54 mmtail rocker, at the tip

21 mm12″ from the tail

23 mm12″ from the nose

88 mmnose rocker, at the tip

471 mmflat to within 3 mm, from 37 % to 63 % of the length

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

84 mmat its thickest, 47 % from the tail

15 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 52.2 L · scaled from the 37.8 L measured

56 mmtail rocker, at the tip

22 mm12″ from the tail

25 mm12″ from the nose

91 mmnose rocker, at the tip

478 mmflat to within 3 mm, from 38 % to 63 % of the length

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

86 mmat its thickest, 47 % from the tail

15 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 57.1 L · scaled from the 37.8 L measured

58 mmtail rocker, at the tip

23 mm12″ from the tail

26 mm12″ from the nose

93 mmnose rocker, at the tip

485 mmflat to within 3 mm, from 38 % to 63 % of the length

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

91 mmat its thickest, 47 % from the tail

16 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 · Measured on Firewire's photo of the 37.8 L. Tail end set by Firewire's photo convention, not checked by a person.