MAGENE – EXAR – Karbon Jant Seti – Carbon Fiber Wheelset Ultra Dark Series – DB508

The Magene EXAR Ultra Dark Series DB508 (2025 Model) is the aerodynamic specialist of the Ultra lineup. While the DB405 you looked at earlier is a climbing ace, the DB508 is designed for “all-around speed”—perfect for rolling terrain, flat-out sprints, and triathlons.

The “Ultra Dark” edition features a sophisticated, stealthy “Night Black” coating with minimalist dark logos, compared to the standard Ultra series’ more visible branding.

Technical Specifications (DB508)

The DB508 uses a more aggressive staggered rim depth to maximize “sail effect” (aerodynamic push) while keeping the front end manageable.

 What Makes the “Ultra Dark” 508 Stand Out?

• Aero-Stability Balance: By pairing a 50mm front with a 58mm rear, Magene allows the rear wheel to act as a rudder for high inertia, while the slightly shallower front rim prevents the bike from “darting” during sudden crosswinds.

• VONOA Carbon Spokes: These are not just for weight; they provide a significantly higher modulus of elasticity than steel. This means when you put down 1,000+ watts in a sprint, the wheel deforms less, transferring more energy to the road.

• 2025 Internal Nipple Upgrade: The 2025 version hides the spoke nipples inside the rim. This cleans up the airflow (reducing drag) and allows for smaller spoke holes, which improves the overall structural integrity of the carbon rim.

• Modern Tire Optimization: The 23mm internal width is specifically designed for 28c to 32c tires. At these widths, the tire sidewall sits flush with the 30mm external rim, creating a seamless aerodynamic surface and allowing for lower pressures without the “squirmy” feel.