Surf

Firewire, 2025

Firewire Neutrino 2025

1600mm long · 5'3"

470mm wide

59mm thick

25.5litres

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 square tail, a full nose and gently curved rails.

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

As listed by Firewire

Firewire Neutrino 2025: every size as listed by Firewire
sizelengthwidththicknessweightprice
25.5 L5'3" · 1600 mm470 mm59 mm–US$995 US$498
27 L5'4" · 1626 mm476 mm60 mm–US$995 US$498
28.5 L5'5" · 1651 mm483 mm62 mm–US$995 US$498
30 L5'6" · 1676 mm489 mm64 mm–US$995 US$498
31.5 L5'7" · 1702 mm495 mm67 mm–US$995 US$498
33.3 L5'8" · 1727 mm502 mm67 mm–US$995 US$498
36.8 L5'10" · 1778 mm514 mm70 mm–US$995 US$498
40 L6'0" · 1829 mm521 mm73 mm–US$995 US$498
44 L6'2" · 1880 mm533 mm76 mm–US$1,125 US$563

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

188016000 mm160025.5 L470 w162627 L476 w165128.5 L483 w167630 L489 w170231.5 L495 w172733.3 L502 w177836.8 L514 w182940 L521 w188044 L533 w

Which Neutrino Size for Your Weight?

The Firewire Neutrino 2025 size each rider would pick, by weight and level

Your weight
≈ 165 lb
Your level

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

The Neutrino 36.8 L

2 sizes fall in your range; the 36.8 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 Neutrino 2025: the size for a rider of 60 to 105 kg, by level
level60 kg75 kg90 kg105 kg
First sessions0.6 to 0.9 L per kg you weigh44 L44 L · smalltoo smalltoo small
Getting there0.45 to 0.55 L per kg you weigh30 L36.8 L44 L44 L · small
Confident0.38 to 0.45 L per kg you weigh25.5 L31.5 L36.8 L44 L
Expert0.33 to 0.38 L per kg you weigh25.5 L · big27 L31.5 L36.8 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 Neutrino 25.5 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

Firewire Neutrino 2025 from above and from the side, every size at true scale, tails aligned
Firewire Neutrino 2025 from the side, true proportions: the bottom's rocker over a flat table, every size

Read off the 25.5 L outline · derived

53 %wide point, 850 mm from the tail

3.41length over width

382mm wide 12″ from the tail

6,244cm² of planform

Read off the 27 L outline · derived

53 %wide point, 864 mm from the tail

3.41length over width

386mm wide 12″ from the tail

6,430cm² of planform

Read off the 28.5 L outline · derived

53 %wide point, 877 mm from the tail

3.42length over width

389mm wide 12″ from the tail

6,617cm² of planform

Read off the 30 L outline · derived

53 %wide point, 891 mm from the tail

3.43length over width

393mm wide 12″ from the tail

6,808cm² of planform

Read off the 31.5 L outline · derived

53 %wide point, 904 mm from the tail

3.44length over width

397mm wide 12″ from the tail

7,000cm² of planform

Read off the 33.3 L outline · derived

53 %wide point, 918 mm from the tail

3.44length over width

400mm wide 12″ from the tail

7,196cm² of planform

Read off the 36.8 L outline · derived

53 %wide point, 945 mm from the tail

3.46length over width

407mm wide 12″ from the tail

7,595cm² of planform

Read off the 40 L outline · derived

53 %wide point, 972 mm from the tail

3.51length over width

409mm wide 12″ from the tail

7,908cm² of planform

Read off the 44 L outline · derived

53 %wide point, 999 mm from the tail

3.52length over width

416mm wide 12″ from the tail

8,326cm² of planform

Rocker of the 25.5 L · measured

44 mmtail rocker, at the tip
16 mm12″ from the tail
24 mm12″ from the nose
97 mmnose rocker, at the tip
422 mmflat to within 3 mm, from 36 % to 63 % of the length
50 %of the length to the lowest point, from the tail
66 mmat its thickest, 52 % from the tail · on the photo; Firewire lists 59 mm
16 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 27 L · scaled from the 25.5 L measured

45 mmtail rocker, at the tip
16 mm12″ from the tail
25 mm12″ from the nose
98 mmnose rocker, at the tip
425 mmflat to within 3 mm, from 36 % to 63 % of the length
50 %of the length to the lowest point, from the tail
68 mmat its thickest, 52 % from the tail
17 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 28.5 L · scaled from the 25.5 L measured

46 mmtail rocker, at the tip
17 mm12″ from the tail
26 mm12″ from the nose
100 mmnose rocker, at the tip
429 mmflat to within 3 mm, from 36 % to 62 % of the length
50 %of the length to the lowest point, from the tail
70 mmat its thickest, 52 % from the tail
17 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 30 L · scaled from the 25.5 L measured

46 mmtail rocker, at the tip
17 mm12″ from the tail
27 mm12″ from the nose
102 mmnose rocker, at the tip
432 mmflat to within 3 mm, from 37 % to 62 % of the length
50 %of the length to the lowest point, from the tail
72 mmat its thickest, 52 % from the tail
17 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 31.5 L · scaled from the 25.5 L measured

47 mmtail rocker, at the tip
18 mm12″ from the tail
28 mm12″ from the nose
103 mmnose rocker, at the tip
436 mmflat to within 3 mm, from 37 % to 62 % of the length
50 %of the length to the lowest point, from the tail
75 mmat its thickest, 52 % from the tail
17 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 33.3 L · scaled from the 25.5 L measured

48 mmtail rocker, at the tip
19 mm12″ from the tail
29 mm12″ from the nose
105 mmnose rocker, at the tip
439 mmflat to within 3 mm, from 37 % to 62 % of the length
50 %of the length to the lowest point, from the tail
75 mmat its thickest, 52 % from the tail
18 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 36.8 L · scaled from the 25.5 L measured

49 mmtail rocker, at the tip
20 mm12″ from the tail
31 mm12″ from the nose
108 mmnose rocker, at the tip
446 mmflat to within 3 mm, from 37 % to 62 % of the length
50 %of the length to the lowest point, from the tail
79 mmat its thickest, 52 % from the tail
18 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 40 L · scaled from the 25.5 L measured

51 mmtail rocker, at the tip
21 mm12″ from the tail
33 mm12″ from the nose
112 mmnose rocker, at the tip
453 mmflat to within 3 mm, from 37 % to 62 % of the length
50 %of the length to the lowest point, from the tail
82 mmat its thickest, 52 % from the tail
19 mmlonger along the bottom curve than flat

Lay this rocker over other boards

Rocker of the 44 L · scaled from the 25.5 L measured

52 mmtail rocker, at the tip
22 mm12″ from the tail
35 mm12″ from the nose
115 mmnose rocker, at the tip
459 mmflat to within 3 mm, from 37 % to 62 % of the length
50 %of the length to the lowest point, from the tail
86 mmat its thickest, 52 % from the tail
19 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 25.5 L. Tail end set by Firewire's photo convention, not checked by a person.

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Closest outlines from other models, same sport first, once stretched to one length and width · derived

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