The ffwd f6r dt180 carbon wheelset features a 60mm deep rim profile that uses darc technology darc technology dramatically improves the aerodynamic properties of the wheel by reducing drag in both frontal and cross wind conditions the double arc darc rim creates optimal aerodynamics by increasing pressure to create faster airflow and less drag on the wheel the ffwd f6r dt180 carbon wheelset utilizes confidence brake technology to increase braking power by 30 in all conditions cbt uses a