The Treadwell EQ DLX, Treadwell EQ DLX Remixte, and Quick CX EQ include dynamo front hubs to power the lights on the bike. In some cases the dynamo hub can cause magnetic interference for a wheel sensor mounted in proximity and that results in erratic and unrealistic high speeds reported by the wheel sensor.
In these cases, we suggest moving the Cannondale Wheel Sensor to the rear wheel. This usually solves the problem.
For more information, please see: Wheel Sensor speed and distance are wrong and I have a Hub Dynamo