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Description
Duotone Fin Set Quad (Slot|Slot) 2026Unlike generic multiuse fin concepts, the QUAD set is engineered as a dedicated, nocompromise quad system. Every outline, profile, and response characteristic has been purposebuilt for maximum control, drive, and agility in highperformance wave conditions. This is the same design philosophy trustedquietly but consistentlyby many World Cup professionals who rely on Kais custom fins to stay ahead of the pack. Now, were making this toptier performance
Unlike generic “multi‑use” fin concepts, the QUAD set is engineered as a dedicated, no‑compromise quad system. Every outline, profile, and response characteristic has been purpose‑built for maximum control, drive, and agility in high‑performance wave conditions. This is the same design philosophy trusted—quietly but consistently—by many World Cup professionals who rely on Kai’s custom fins to stay ahead of the pack. Now, we’re making this top‑tier performance available to everyone.Shorter fins. Higher performance.Proof of their level of efficiency is the fact that our fins are 1–2 cm shorter than comparable quad sets. This is made possible through our exclusive AI_FIN CAD software, which achieves a flawless profile transition in the critical tip area where the fin sweeps backward. The result?Radically enhanced maneuverabilityGreat grip without being stickyInstant response in every turnPremium materials. Maximum precision.The center fin is CNC‑milled from black G10, an ultra‑dense, prepreg‑laminated fiberglass material renowned for:Outstanding durabilityExceptional impact resistanceEasy sandability to repair ground‑contact damageThis is the level of reliability and performance that serious wave sailors demand.Choosing the right sizeSelect your QUAD set according to the recommendations below. Oversized fins create excessive tail lift, making your board feel sticky and harder to turn. Proper sizing ensures your board performs exactly as intended—loose, fast, and precise.Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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4.8 ★★★★★
Based on 2344 reviews
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Product Reviews
★★★★★ 3
Good points, but too verbose and in the clouds at times.
Format: Kindle
This book has great points and analysis of trends, and a sensible outlook of what they might lead to. If you already understand the main ideas in this book, it's a good refresher and will solidify your current understanding, but may not really lead to any new "mindblowing" revelations. At times, his head is too in the clouds, and his age shows with predictions that read like bad 1960s sci-fi with things like "computorium" "gray goo" and "nanobots". While his overall points stand strong, some specific technologies he thinks will take off don't seem to have any basis or proof of concept in the real world and might be dead in the water, think "solar freakin roadways" style. He is also very full of himself, repeatedly gloating to the reader of all the "predictions" he made over the years that came true. The biggest weakness of this book is by god does he need an editor, it is way too verbose because the information is not organized well and he repeats himself A LOT. The chapters read like independent blog posts rather than a book due to how repetitive some of his points and information is. Often factoids and paragraphs are bizarrely repeated nearly verbatim pages later. But overall, it's a solid read and those uninitiated to the ideas in this book should absolutely heed their importance.
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Reviewed in the United States on January 10, 2025
★★★★★ 5
Ray at best
Format: Hardcover
Great ai know how
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Reviewed in the United States on May 20, 2026
★★★★★ 4
Audiobook has TERRIBLE narrator; book is very techical
Format: Hardcover
So this is a fascinating book -- the author has an incredible depth and breadth of knowledge in a vast array of technical (and medical) subjects. Note this is a much more technical book than your typical science book intended for the educated layperson. That's a big plus for me, but others might be put off by the level of detail.
The main fault with the book is the audiobook's narrator, Adam Barr. He has a deep voice that is easy to understand, but he is just about as dull as can be, sounding as if he's reading the ingredients on a can of soup. I ended up buying the hardcover version of the book because the audiobook could not hold my attention -- because of the narrator, not because of the content, which is amazing.
I wish more narrators would take a page (ha ha) from talented pros such as Ray Porter and Wil Wheaton. Just because this book is nonfiction doesn't mean it can't be read with heart, as if the reader was speaking to me personally, with enthusiasm, and not just reading words out loud.
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Reviewed in the United States on November 24, 2024
★★★★★ 5
The Final Warning
Format: Kindle
No more heads up after this one guys. Ray is not known for missing futurological insights. He’s placed many predictions within this work and it’s my belief that they will occur even sooner than he imagines. That said, the time for comfort with our current way of living is over, and this book functions as the last glance of insight to carry you through with knowledge of what could be. Without it, you are very likely to be entirely blindsighted.
The world is changing much faster than the vast majority of people realize. Even those paying close attention to technology. Learn what you can do you can prepare. This book is likely the best way to get ahead of the curve, and adds many new concepts and refinement than the first in the series
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Reviewed in the United States on December 24, 2024
★★★★★ 5
Superior purchase
Format: Hardcover
Book was in better condition than was advertised. Book was delivered earlier than expected. Book was packaged very very well. Excellent transaction and experience!! Will look forward to purchasing items from this seller in the future! Added bonus-reading the book was a great and thought provoking experience.
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Reviewed in the United States on May 9, 2025
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