The POLAKOW TWINSER QUAD and the TWINSER QUAD boards come with this fin size in Quad set-up. For Twinser-use in the same range use 2cm bigger fins (table on the right).
THRUSTER FIN USE
SINGLE FIN USE
US BOX Fins
Single Thruster Pro
Single Thruster FWS
74
82
92
99
106
74
82
92
99
106
recommended sails
<5.8
4.0-6.0
4.4-6.2
4.7-6.5
5.0-6.7
<5.8
4.0-6.0
4.4-6.2
4.7-6.5
5.0-6.7
Size
Length
Area cm²
Sails
WAVE (G10)
19
7.5"
157
<5.5
<4.7
<4.5
20
7.9"
166
4.0-5.4
4.0-5.4
4.0-5.0
<5.0
<4.5
21
8.2"
176
4.4-5.8
4.7-5.8
4.4-5.8
<5.5
<5.5
<4.7
<4.5
22
8.5"
189
4.7-6.2
5.4-5.8
5.0-5.8
4.7-6.2
<5.8
<5.8
4.0-5.4
4.0-5.0
<5.0
23
9.0"
198
5.0-6.5
5.4-6.0
5.4-6.0
5.0-6.2
<6.2
4.7-5.8
4.4-5.8
<5.5
<5.5
<5.5
24
9.4"
211
5.4-6.5
5.8-6.2
5.8-6.2
5.8-6.2
5.2-6.2
5.4-5.8
5.0-5.8
4.7-6.2
<5.8
<5.8
25
9.8"
221
5.0-6.5
5.4-6.0
5.4-6.0
5.0-6.5
5.4-6.5
5.4-6.0
5.4-6.0
5.0-6.2
<5.2-6.5
26
10.2"
234
5.0-6.5
5.8-6.2
5.8-6.2
5.4-6.5
5.8-6.5
5.8-6.2
5.8-6.2
5.4-6.5
5.0-6.2
WEED WAVE (G10)
only recommended to be used in Single-fin set-up
21
8.3"
245
<5.4
<5.4
<5.4
<5.4
<5.4
<5.4
<5.4
<5.4
<5.4
<5.4
<5.4
26
10.2"
309
5.0<
>5.0
>5.0
>5.0
>5.0
>5.0
>5.0
>5.0
>5.0
>5.0
>5.0
this fin comes with the board
The SINGLE THRUSTER boards in PRO Edition come with the Thruster-fin set-up. For Single-fin-use in the same range use 2cm bigger fins. The SINGLE THRUSTER boards in Full Wood Sandwich come with the Single-fin set-up. For Thruster-fin-use in the same range use a 2cm smaller and the Side fins.
