The Campagnolo Pro-Tech Bottom Bracket helps gravel riders pedal smoothly and powerfully while protecting their crankset against water and debris. This version is designed for compatibility with frames featuring a BB30 to 68×42 style. To protect it from the elements during a gravel ride, this bottom bracket includes an external sealing ring and has a fiberglass-charged polyamide central tube to protect against the ingress of water and mud. External stainless steel bearings are attached to the crankarms for easier maintenance. The Campagnolo Pro-Tech Bottom Bracket is designed with performance for gravel riders in mind.