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Greenough 4A 9” Single Fin (Used) - Surfboardbroker
Greenough 4A 9” Single Fin (Used) - Surfboardbroker
True Ames Fins

Greenough 4A 9” Single Fin (Used)

Only 1 left
$65.00
Sale $100.00 $65.00

USED SURFBOARD FIN

 

The Greenough 4-A Single Fin is the most iconic, functional and versatile single fin available, because it works extremely well on just about every type of surfboard. The 4-A has been True Ames' bread and butter for over 40 years now, and it is still the most popular single fin design there is due to it's all-around and well-balanced performance.

Form | Medium profile, full base coupled with a tapering & moderately flexible tip

Function | A fin that will hold when you need it to and release when the time is right

Feel | Neutral-positive, perfectly-balanced, a fin that will drive off the bottom, and have an acute responsiveness through arcing turns

Overall | Versatile - designed for all board shapes and surf conditions

Volume Reference Guide

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Weight Beginner Intermediate Advanced Pro
80 lbs
36 kg
 23.9L 19.9L 16.75L 15.9L
85 lbs
38.25 kg
 24.4L 20.7L 17.4L 16.6L
90 lbs
40.50 kg
 25.7L 21.5L 18L 17.20L
95 lbs
42.75 kg
 26.5L 22.1L 18.5L 17.7L
100 lbs
45 kg
 27.2L 22.6L 19L 18.2L
110 lbs
49.5 kg
 29.2L 24.4L 20.5L 19.5L
120 lbs
54 kg
 31L 25.9L 21.8L 20.7L
130 lbs
58.5 kg
 31.8L 26.5L 22.3L 21.2L
140 lbs
63 kg
 33.3L 27.8L 23.3L 22.2L
145 lbs
65.25 kg
 34.5L 28.8L 24.2L 23L
150 lbs
67.5 kg
 35.7L 29.8L 25L 23.8L
155 lbs
69.75 kg
 36.9L 30.8L 25.8L 24.6L
160 lbs
72 kg
 38.1L 31.9L 26.7L 25.4L
165 lbs
74.25 kg
 39.3L 32.8L 27.5L 26.2L
170 lbs
76.5 kg
 40.5L 33.7L 28.3L 27L
175 lbs
78.75 kg
 41.7L 34.7L 29.2L 27.8L
180 lbs
81 kg
 42.9L 35.7L 30L 28.6L
185 lbs
83.25 kg
 44L 36.7L 30.9L 29.4L
190 lbs
85.5 kg
 45.2L 37.7L 31.7L 30.2L
195 lbs
87.75 kg
 46.4L 38.7L 32.5L 31L
200 lbs
90 kg
 47.6L 39.7L 33.4L 31.8L
210 lbs
94.5 kg
 50L 41.7L 35L 33.4L
220 lbs
99 kg
 53.9L 44.9L 37.7L 36L
230 lbs
103.5 kg
 57.9L 48.2L 40.5L 38.6L
240 lbs
108 kg
 62L 51.7L 43.5L 41.4L
250 lbs
114 kg
 66.1L 55.2L 46.5L 44.2L
260 lbs
118 kg
 70.2L 58.7L 49.5L 47L
270 lbs
123 kg
 75L 62.7L 53L 49.8L

Volumes are a general starting guide. Your ideal volume can shift based on board outline, fitness, wave conditions, and personal preference. Still unsure? Contact us and we'll help you dial it in.

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