This model is designed to be used with carbon MTB MegaExo cranksets on 68mm wide BB30 shells. Ceramic ball bearing with hardened steel races. Full Speed Ahead (FSA) produces world-class bicycle components for road cycling and mountain biking, and they supply many of the world’s leading road and mountain bikers. Their history in the sport and heritage of innovation in design and manufacturing is important to FSA. They’re proud that they constantly invest in their products and range to ensure that they provide the very best components possible – for both professional and enthusiast riders alike.