Rhoan: CSTM

$300
48reviews

What hits the wind first matters most.
Most helmets force a choice: speed or cooling. Rhoan is built different—3D printed to channel air, shed heat, and custom-built to your exact fit.
Benchmark aero. Airflow you can feel. Comfort all day.

Custom-built. Delivered in 3–4 weeks after fit approval.

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Benchmark aero • Airflow you can feel • Virginia Tech 5-Star Safety Rating • BEST NEW BIKE GEAR: GEAR JUNKIE

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30-Day: Full Refund Guarantee
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100% Crash Replacement Program
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5 year warranty
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Made in USA
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To us, CSTM means more than fit — it means honoring the individuality of every rider.

Your journey, your style, your story deserve more than a one-size-fits-all solution. That’s why every KAV helmet starts with you — your shape, your preferences, your identity — and is built from the inside out to reflect who you are.

Create Your Own is our way of putting the power of design in your hands, so the helmet you wear is as personal as the ride you take.

1: Order & Scan

After your purchase you will receive an order confirmation email with a link to download our KAV Fit App.Using just one photo, our app captures every contour, every curve of your head, ensuring your helmet is crafted to match your unique shape.

2: Fit Confirmation

After receiving your scan, we 3D print a "Fit Cap" mirroring your future helmet's interior. This cap is sent to your doorstep, allowing you to experience the fit and comfort firsthand.Your Fit Cap, comes with a QR code that you scan providing options to approve the fit or request adjustments, ensuring your helmet will be perfect.

3: Craft & Delivery

Once you approve the fit cap, our experts start the meticulous process of crafting your helmet. We adjust every detail to match your unique head shape, ensuring optimal comfort and protection.

Learn More Here

Rhoan stands among the fastest helmets on the market, within 0.001 CDA, or ~1 watt at 40km/h—while delivering airflow, cooling, and comfort they can’t touch.

The Rhoan earned a 5-Star Virginia Tech Safety Rating through a ground-up reengineering of impact protection.

At its core is our Hex Honeycomb Structure 2™ — a dual-density, 3D-printed lattice with independent hexagonal cells that deform asymmetrically to manage both linear and rotational energy.

This architecture eliminates the need for traditional slip-plane systems by integrating rotational management directly into the structure, resulting in lower weight, improved ventilation, and uncompromised real-world performance.

A 1°C rise in core temperature can reduce performance by up to 1.5%.

The Rhoan is made from our proprietary PolyCarbon Composite™ that wicks heat 8x better and cools 2x faster than standard EPS foam—helping you delay thermal fade and hold watts longer.

The Air Fit Suspension and HexFlow™ Rear Exhaust work together to create full-helmet airflow. Heat is actively pulled away from your scalp—maintaining focus, control, and comfort, even on the hottest days.

Our next-gen Hex Honeycomb Structure 2™ acts as a thermal scaffold, channeling air through its open-cell design. It improves both impact absorption and heat dissipation without adding weight or bulk.

Designed and manufactured in the USA using a net zero production process—delivering innovation, sustainability, and performance without compromise.

What People Are Saying

Very light and comfortable. I like the style and it was a very easy process to get fitted for this unique helmet.

Richard. _ 12/30/24

KAV stands by their products. In October, I had a cochlear implant, which changed the dimensions of my fit. KAV offered me a significant discount, provided a re-fit to accommodate my implant. Not only an excellent NOVA product, but outstanding customer service.

Lane. _ 12/18/24

It feels great throughout long rides and I even forgot to take it off after a ride recently! Do yourself a favor and order the perfect helmet - for comfort, safety, design, weight, and ventilation!

Claudia G. _ 11/06/24

This is the best helmet I’ve ever owned. No more adjusting the back closure and looking in the mirror to make sure it is not crooked on my head. Fits perfectly every time.

John M. _ 10/30/24

I had the amazing opportunity to be able to purchase one of their 3-D printed helmets with custom coloring.

Alex Y. _ 10/29/24

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2x Larger Front Vents

Strategically placed lower on the brow to funnel cooling air directly to the forehead, where thermoregulation is most effective.

It’s not just about vent size—it's about vent placement that works with your physiology.

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A Fit That Breathes

Our Air Fit Suspension System™ suspends the helmet off the head, eliminating pressure points and maximizing ventilation.

This all-around airflow helps reduce hot spots and maintain a cooler, more stable core temperature throughout your ride.

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5-Star Virginia Tech Safety Rating

The Rhoan’s Hex Honeycomb Structure 2™ uses a dual-density, 3D-printed design that adapts independently on impact — absorbing energy from both direct hits and rotational forces.

This advanced structure eliminates the need for bulky add-ons, reducing weight while enhancing real-world safety and comfort.

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Aerodynamics That Actively Cool

Engineered to harness the Venturi effect, the HexFlow™ Rear Exhaust accelerates air as it exits the helmet—pulling heat and moisture away from your head with every effort.

Working in tandem, the Air Fit Suspension System lifts the helmet off your scalp to create uninterrupted airflow throughout. The result: better cooling, reduced core temperature, and sustained power when it matters most.

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Lock In. Ride On.

Redesigned and 3D printed for real-world use, the new sunglass ports make it easy to stow your shades mid-ride—and keep them secure, even over rough terrain. No slipping. No rattling. Just smart, ride-ready utility.

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HOW WE COMPARE

The future of personalized performance

108 Measurements, 1 Perfect Fit

Optimized for Rotational & Linear Forces

Virginia Tech 5 Star + 50% Above CPSC Safety Standards

Crash Replacement

Warranty

Proudly Crafted in the USA

KAV3D
PRINTED HELMETS

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100%

5 Years

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TRADITIONAL EPS
FOAM HELMETS

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35%

2 Years

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