Campagnolo Ultra-Torque bottom brackets

Campagnolo Ultra Torque™ Pressfit bottom brackets allow the installation of cranksets on frames with oversized bottom bracket shells.

FEATURES

• Suitable for oversized bottom bracket shells
• With extended mounting surface

TECHNOLOGY

Ultra Torque™ Low weight, stiffness, and easy maintenance: Ultra-Torque™. Six years after its introduction, Ultra-Torque™ is still recognized as the most powerful bicycle bottom bracket axle in terms of strength, weight savings, and power transmission. Campagnolo has made it possible for the two halves of the bottom bracket to be inseparably joined to their respective crank arms. This new development has significantly reduced the lateral protrusion from the frame, thus preventing undesirable contact of the ankles with the crank arms while pedaling. Assembly is extremely simple; a single oversized bolt is used to firmly connect the two halves of the axle. In terms of efficiency in transmitting torque, this system can be compared to a one-piece axle.
Moreover, despite the narrow lateral profile, it has been possible to position the bearings outside the bottom bracket shell, making the axle, which has been given a larger diameter, stiffer thanks to the increased support width. The extraordinary performance characteristics of Ultra-Torque™ have been achieved thanks to a system that originated in engine construction in the field of clutches and rotating shafts: the Hirth™ joint. This is a self-centering and self-aligning spiral-toothed coupling connection, located in the center of the inner bearing axle, where the ends of the axle halves firmly connected to the crank arms touch each other.

SPECIFICATIONS