Radical5 - power on demand
Radical5 - power on demand


Freeride, Lightwind

The unbelievably early planing ability combined with the unexpectedly good handling is what makes the Flydoor4 stand out above the rest. Riding toe-side, jumping, cruising. The Flydoor4 just feels much smaller than it is, however still delivers unmatched upwind performance.

SKILLSBeginner +
SIZES160x44 / 170x50





Infinite Possibilities

Infinite Possibilities

The reputation of the Flydoor boards for having amazing light-wind properties is well known, but the huge wind-range of the boards allows you to have extra kite days even in extremely gusty conditions. Many of the small inland spots and lakes are now properly enjoyable. Because of this it is not only a great board for beginners, even though there is almost no better board to learn on. From water-start to loaded tricks, it can do everything without being too much of a challenge from it’s rider.



It’s always a challenge to combine early planing and good agility into one board. To achieve this we had to work on a lot of small details. Key to this is the redesigned 8cm long centre fin that is an important factor for upwind performance. The wood-foam composite core allows for light weight without compromising the durability. The new laminate layup gives the board more torsional stiffness which works together with the extremely thin flex-tips to give you an optimal combination of great control, comfort and dynamic feel.

FLYDOOR4… proven light-wind weapon

It is self-evident that great riding characteristics alone are not enough. Starting with the Radical4 we moved our production to a factory in Europe that promises the highest quality and precision. Only the highest quality materials are used. For example the most high end top-sheets available. Our tried and tested footpads, G10 fins and our new comfortable and bombproof velcro foot-straps finish off the complete package. To be extra sure in regards to the durability, we used foot-strap inserts which can withstand up to 400kg of pull each. In our opinion it has to be like this, because Everyday is a kiteday!

Radical5 Instruction

Total package consists of:

1x Flydoor4
2x Straps (incl. Screws)
2x Pads
4x 5cm Finns G10 (incl. Screws)
1x Grab-Handle (incl. Screws)
1x Grabrail-Set

Flydoor4L 160 x 44XL 170 x 50
Length (cm)160170
Width (cm)4450
Weight (kg)3.43.7
Stance width (cm)50.4 - 56.2 - 61.250.4 - 56.2 - 61.2
Core MaterialWood-Foam CoreWood-Foam Core
Fins4x 5cm G10 +
1x 8cm Center-fin
4x 5cm G10 +
1x 8cm Center-fin
Recommended BoardbagConcept X Explorer 167cmConcept X Explorer 167cm
FlyDoor4 XLDEKitelifeJahrbuch 2014
FlyDoor4 XLDEGleiten.tv06/2013
FlyDoor4 LITStanduppaddling.it04/2013
FlyDoor4 LENiksurfmag.com 04/2013
FlyDoor4ENkiteforum.com 03/2013
Made in EU

Since we manufacture our boards within Europe we can guarantee the highest precision and quality, and ensure that only the best materials are used in their construction.

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