Flysurfer · 2025
Sonic V4
The Flysurfer Sonic V4 is a high-performance ram-air foil kite designed for racing and ultra-light wind foiling. Its very high aspect ratio delivers unmatched upwind performance and low-end power.
Best for: Foil racers and ultra-light wind specialists
Style Placement
Riding Style
Kite Shape
Specifications
Expert Review
The Flysurfer Sonic V4 is a high-performance ram-air foil kite that meaningfully closes the gap between the demanding Sonic 3 and the user-friendly Soul, delivering race-level performance in a far more forgiving package. Its biggest upgrade is wingtip stability — collapses that plagued the Sonic 3 are essentially gone unless you deliberately oversteer. The main caveat is that it retains some of the Sonic's edginess at the margins of the wind window, and wingtip inflation on launch can be slower than the Soul.
Pros
- +Far more stable wingtips than Sonic 3 — collapses essentially eliminated
- +Much more forgiving on mistakes; kite won't fall out of the sky
- +Strong power spike on loops, closer to Soul behavior than Sonic 3
- +Noticeably improved relaunch; less prone to bow-tying
- +Adjustable bar pressure via Z-main bridle setting
- +Suitable for a wider range of riders than previous Sonics
Cons
- −Wingtips can still flutter or taco at the edge of the wind window
- −Wingtip inflation on launch slower than the Soul — may need a back-stall to open
- −Slightly reduced aspect ratio means marginally less pure race performance than Sonic 3
- −Riders accustomed to the Soul may find the feel nearly indistinguishable in easy conditions, making the upgrade case harder to justify
Best for
Experienced foil kite riders stepping up from the Flysurfer Soul, or Sonic 3 owners who want serious performance without the unforgiving behavior of the older model.
Not for
Beginners to foil kiting or riders who want a relaxed, stable all-rounder — this is still a performance-oriented kite requiring solid flying skills.
Synthesized from: Our Kite Life
Video Reviews
Our Kite Life
Our Kite LifeWhat they said
it's always exciting when we've got a brand new kite to review and in this video we're going to be doing a deep dive on the 10 meter fly Surfer Sonic 4. [Music] [Applause] before we get started it's important to mention that kite reviews are tricky because the quality of wind can greatly influence how you feel about a kite for that reason when we t
Bottom line
model right they haven't veered away too too far away from it in fact they've improved it in the past I always told myself I would not buy a Sonic because of my age and kiting style but I would definitely consider the Sonic 4. if you're a Sonic flyer the new Sonics I like it I really do so there you have it our review of the 10 meter fly Surfer Sonic 4. let us know in the comments below what you think and if you're excited to try this kite thank you for watching and we'll see you in the next one
Rider Reviews
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Where to Buy
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