2025 RADON VAILLANT 9.0 ROAD BIKE The VAILLANT 9.0 is once again our golden midway model this year: High-end equipment at an affordable price. What does that mean? High-quality parts wherever you look - but first things first. With the electronic 2x12 Shimano ULTEGRA drivetrain, you have the perfect basis for your new best time on board as standar..