Harlem Flow Surf Kite Review with Ralf Groesel & Aaron Hadlow

The Brazilian Brothers sat down with two legends of the sport: kite designer Ralf Groesel and pro kiter and designer Aaron Hadlow. They dive deep into Harlem's first dedicated surf kite, the Flow, to discuss its development, design characteristics, and how it performs on the water.

What Makes a Good Surf Kite?

Ralf explains that over the last two years, he spoke with a wide range of people in the industry — riders, influencers, and magazines — and when he asked 20 of them what makes a good surf kite, he got 20 different answers. Ultimately, it depends on where you are, what you want, which board you ride, the wave conditions, and where the wind is coming from.

Technically, it's impossible to design a single wave kite that's perfect for every condition, so the goal was to build one that handles most of them as well as possible. That was anything but easy — it took a solid two years of testing different design strategies and philosophies to arrive at a technically clean concept.

The Flow's Design Concept

Aaron likes the Flow because it reminds him of his old C-kite days — even though it's the exact opposite of what an old C-kite looks like. It's fully bridled with eight attachment points on the leading edge and uses very few segments to keep the frame stiff, which opens up other design advantages, like creating huge tip areas.

Aaron Hadlow's Transition to Strapless

Aaron has always had his hand in wave riding, but diving deep into it was a steep learning curve. He talked to friends on the tour about what they look for in a wave kite, then tested the Flow across the board to figure out how it works — riding it on twin-tips in Cape Town, testing the low end in 10 to 15 knots, and putting it through its paces on big and small surfboards.

In Cape Town, you often deal with dead cross-shore wind. You want the kite to either drift or turn on a sixpence — a really tight turn without much power. You want connection when depowered, but you also need sheet-and-go. They concluded you can't pinpoint a single type of kite for every wave rider, but they came up with one that's intuitive and easy to use, letting you put the kite wherever you want.

Aaron even had fun sessions on a twin-tip with the Flow. The loops aren't aggressive, your timing doesn't have to be perfect, and when you sheet in, the kite simply pulls you up.

Harlem Flow vs. Harlem Thrive

Ralf breaks down the differences between the Flow and the Thrive:

• Harlem Thrive: A high-end, three-strut, high-aspect, high-performance kite intended to push jumping and looping ability.
• Harlem Flow: The main point is ease of use. It's a low-aspect, boxy kite with an insane low end.

A kite like the Thrive or the Peak bites into the wind and thermals, shooting you up — they scream at you to jump. The Flow lets you jump whenever you want, but it isn't spiky. Its damping ability, in particular, blew the team away.

Characteristics

Damping Ability for Strapless Riding

Damping means that when you hit a gust, you barely notice it — the kite absorbs the spikes. In typical gusty Cape Town conditions, the Flow handles this far better than the Thrive. If you want a damped kite to cruise on, it's great.

That damping is one of the most important aspects for strapless wave riding — you don't want to be pulled off the board in every gust. The Flow smooths and flattens things out, with rounded turns, balanced sheet-in feel, and consistent bar pressure. It's very well balanced overall.

Because it has an insane low end, wave riders can size down and still get up on the board. And despite sitting low in the window, the depower is huge — it still shoots back into the window and sends you upwind.

Water Relaunch

Because the Flow is a low-aspect, boxy kite, it doesn't have a true auto-relaunch where you do nothing and it just goes. However, it does have an instant water relaunch — you basically just look at the bar, grab it, and the kite launches.

Why Choose the Flow Over Other Wave Kites?

When asked why someone should choose the Flow over other established wave kites on the market, Ralf points to the package as a whole. Following the philosophy Harlem has built over the last 15 years, the goal is making sure you have the most fun on the water. Making something consistent and intuitive is anything but easy, and they're stoked about what they created.

Aaron adds that the Flow is a great crossover kite. He points out that the first triple loop ever landed was by Lorenzo Casati on a Cabrinha Drifter — a wave kite — proving that wave kites can absolutely cross over into big air. The Flow looks beautiful, and if you want to take a twin-tip out on it, you won't be disappointed.

Summary

The Harlem Flow is the brand's first dedicated surf kite, two years in the making, designed around the philosophy that no single wave kite can do everything: but a well-built one can do most of it really well. With a low-aspect, boxy outline, eight bridle attachment points on the leading edge, and very few segments in the frame, the Flow delivers an enormous low end, exceptional damping, and rounded, predictable turns that won't yank you off the board in gusty conditions.

Compared to Harlem's high-performance Thrive, the Flow trades aggressive jump-and-loop response for smoothness, intuitive handling, and crossover versatility. It pairs naturally with Harlem's new shortboard hybrid surfboard for a complete wave package, and while it skips traditional auto-relaunch in favor of an instant grab-and-go relaunch, it more than makes up for it on the water. Whether you're carving cross-off in Cape Verde, riding choppy onshore in Europe, or just looking for a damped, easygoing kite that still has plenty in reserve, including the occasional twin-tip session, the Flow is built to be a fun, forgiving, and capable all-rounder.

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