Mast rake shim set. This rake shim set consists of 7 rock solid shims (or spacers) to change and fix the rake of the mast. These shims are resistant to the high pressure that comes on the shims. These shims are suitable for foil boxes with a straight top. Also suitable and allowed in the IQfoil class.

The mast rake shim can be used in 2 ways;

1. To positively change rake of the mast (thickest side forward)
2. To change the touching of the mast negatively (thickest side to the back)

Mast rake spacer set includes:

• Shim of + 0.5⁰ or – 0.5⁰
• Shim of 1⁰ or -1⁰
• Shim of 1.5⁰ or -1.5⁰
• Shim of 2⁰ or -2⁰
• Shim of 2.5⁰ or -2.5⁰
• Shim of 3.0⁰ or -3⁰
• Shim of 3.5⁰ or -3.5⁰
• Handy collection ring

Please note, you may need longer bolts!

You may need longer bolts to slide the shims between the board and the foil. We sell stainless steel Torx bolts in various sizes.

Tips on adjusting mast rake

In the video below, F4 Foils team rider Jordy Vonk explains the effect of adjusting the angle of the mast.