"Victory never comes easily The 1080 Clincher takes advantage of Zipp's M2CM technology. It's the most advanced method to join carbon and aluminum, and it results in a nearly bombproof rim with the convenience of a clincher and the reliability of an aluminum braking surface. Lest we forget, the 1080 Clincher also features the most aerodynamic non-disc rim in the world. The Zipp 1080 rim is not compatible with the PowerTap hub. This is due to the severe spoke angle caused by the very large flange of the PT hub combined with the very small ERD of the 1080 rim. This combination results in an overly severe spoke angle at the rim/spoke interface in a built wheel. This is not the bracing angle of the spoke, but the angle relative to the tangency of the hub resulting in a very high off-radial angle at the rim. This leads to premature nipple and spoke thread failures at cycle counts far below the Zipp minimum requirement for fatigue durability.
