High performance closed cell race kite

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Flysurfer SONIC FRThe SONIC Full Race is optimized for competition on any surface – Water, Land & Snow. The sheer force and speed of this pure bread racing machine, gives you thrills, goosebumps and more. The kite cuts through air at angles into the wind never seen before. The most extreme lift and hangtime any Flysurfer kite has ever delivered, is now combined with sophisticated handling, in a unique super high aspect-ratio, closed-cell ram-air foilkite. Only the best and most optimized fabrics have been used to achieve maximum performance, minimum weight and incredible stability.

The Flysurfer design team worked in conjunction with the best hydrofoiling and snowkite athletes to sculpt this amazing wing. Together with the most advanced technology available from our paragliding department, we were able to achieve the most powerful and performance orientated race kite.

The Sonic FR is the pure expression of Flysurfers DNA. Innovation, Aesthetics and Performance.

Choose the SONIC-FR in sizes 11m, 15m, or 18m together with the optional Infinity 3.0 Race-Bar or Infinity 3.0 Airstyle bar.

Experience the buzz of extreme lift to drag ratio.

In turbulent or gusty winds the BOOST would be easier to use and handle for both freeriding and racing when compared to the SONIC-FR.


Double Cordwise Ballooning
Double Cordwise Ballooning is minimizing the creasing of the cells on the SONIC-FR to an absolute minimum. With exactly calculated arc-shaped panel cuts, double-stitched and glued seams a perfectly smooth, high performance airfoil is created.

Flat Winglet Technology
The Flat Winglet technology reduces the induced aerodynamic drag, but at the same time increases lift. This leads to a noticeable improvement in lift to glide ratio and forward flying speed of the kite. As well as better turning speed without wingtip collaps.

Rigid Foil Technology
Instead of classic Mylar reinforcements, the SONIC-FR uses Rigid Foil Technology to reduce wrinkles on the leading edge. This results in reduced aerodynamic drag and enhanced kite stability. Rigid Foils are are also used to stiffen the trailing edge of the kite canopy. As a result, the SONIC-FR translates every gust of wind into propulsion without deforming the canopy. Thanks to the Rigid Foil Ribs the kite canopy is stiffer and more dynamic, but remains light and has minimal pack size because of the great flexibility of the R.F.T.

Sharp Mini Ribs
To optimize the airfoil, the number of cells on the trailing edge has been doubled. This gives the SONIC-FR a razor-sharp trailing edge, otherwise known only from competition paragliders. Drag is reduced and the kite remains light.

Maximum Pressure Valves
The M.P.V in the leading edge center provide maximum air pressure inside the kite. The kite fills fast and accelerates even when fully depowered. Through the double valves in the center area, the dynamic pressure is always there, where it is needed. A moving separator inside the valve carries the airflow directly into the kite, regardless of angle of attack. Therefor the SONIC-FR is stiffer, more responsive and stable.

Low Drag Lines
Thanks to our cooperation with Liros and a new ultra high-strength Dyneema SK99 fiber core, we have developed new, significantly thinner race lines, which are now used for the first time in the SONIC-FR. The front lines have only 1.2mm thickness and 200kg breaking load, the back lines an amazing 0.8mm thickness and 160kg breaking load. The completely unsleeved dyneema bridle is correspondingly even thinner.

Cloth Material
During the development of SONIC-FR, Lotus cloth and Deluxe cloth were constantly compared in 1:1 tests. Deluxe cloth is stiffer, accelerates a tiny bit better and is more responsive, after numerous benchmark tests, no loss in performance or speed was observed. Thanks to Double Cordwise Ballooning and Rigid Foil Technology we have found a technical solution that eliminates the slight weight penalty and wrinkling of the Deluxe cloth. Different fabrics are used for internal ribs, v-cells and straps since airtightness is less significant here, but diagonal stiffness is important. The SONIC-FR top and bottom sail fabric are deluxe cloth, which has no disadvantage in performance and pricing is not increased unnecessarily.

Infinity 3.0 Race Control Bar
The Infinity 3.0 Race Control Bar impresses with new and proven features:

1 Lighter & thinner control bar with durable & ergonomic EVA Grip design (Sizes: 50cm & 60cm)
2 Simplified winder, adjustable bar-width & tuning options
3 Optimized one-piece double v-shaped low friction eyelet
4 Certified QR 2.0 with endless rotations & short front line safety (FLS)
5 Anodized 4:1 clam-cleat race system with Ronstan pulley for easy & precise adjustment
6 Color coded & most performance orientated race kite lines on the market (front 1.2mm/back 0.8mm)
• Optional race kite line extensions in 2m & 4m as well as a 21m race flying line set is available in our webshop
• Thin but slip-resistant leader lines with re-launch balls
• The Race control bar is excluded from 12 months free repair warranty

IKA registered
Flysurfer is passionate about kite-racing and has registered the SONIC-FR kite officially. This allows you to attend every official IKA racing event.

Automatic Drainage System
Should sand or water get into the kite, it will automatically be expelled from the kite by the „dirt&water“ drainage system, which is integrated into the canopy of the SONIC-FR.

Each cloth, each line and each component has been tested extensively by Flysurfer. We constantly create more work for ourselves in order to guarantee pure worry-free kiting fun. When it comes to materials and components, we always go for quality and functionality over price.


Size Colour Price Kite Only
9m white/black/green £1425
11m white/black/blue £1510
15m white/black/orange £1725
18m white/black/green £1895

Buy Now

Every SONIC-FR includes:
1x SONIC-FR Kite
1x SONIC-FR Gear Guide
1x Repair Kit (inclusive Safety Leash, Depower Line and further spare parts)
1x SONIC-FR Kite Bag
This kite is excluded from 12 months free repair warranty

See our stockists.

Additional information


9m, 11m, 15m, 18m

Control Bar

Kite Only, Airstyle Bar, Race Bar Pro