The C60 was developed during 2 years of both CFD analysis and windtunnel testing. Many different shapes, combined with different tire models and sizes culminated in this rim shape, the best we could do. That sounds normal, but what happened next wasn’t. As soon as the C60 was finished, we started working on the next generation. But whatever we tried, we couldn’t improve on the C60 shape. Even with much larger tires (up to 40mm with knobby tires), we couldn’t find a shape better than the C60. Of course we don’t accept that we can never do better than the Discus C60, we will keep trying, but until then, we’re confident these wheels will surprise you as positively as they do us.