The Ekar bottom bracket is designed specifically for gravel and all road riding. Featuring a patented ProTech™ system with an external sealing ring and internal sleeve protects from water, grit and dirt ingress. Oversized, protected external stainless steel bearings attach directly to crank arms for a smooth, fluid performance. Technology ProTech™ system: seals against dirt and moisture Oversized, protected external bearings: for smoothness Specification Designed specifically for Ekar 1x13 groupsets Suitable for Gravel and All-Road riding Full compatibility with all threaded and PressFit standards (BSA, ITA, BB86, BB30, BB30A, BB386, PF30, BB Right, T47) Weight: 50g