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 either T47x68 frames. 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.