True Ames Greenough 4A Single Fin
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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. Available in red, smoke, Orange, blue, black, green, kelp, clear, Yellow, purple, Rotten Avocado, sizes 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.75, 10.0, 10.5.
Specifications
| Construction | Solid Fiberglass |
| Fin System | Standard US Center Box |
| Profile | Medium profile, full base with tapering tip |
| Flex | Moderately flexible tip |
| Sizes Available | 6.5", 7.0", 7.5", 8.0", 8.5", 9.0", 9.75", 10.0", 10.5" |
| Recommended Board Types | Longboards, mid-lengths, hulls, gliders, shortboard 2+1 setups |
| Designer | George Greenough |
| Made In | USA |
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
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