FSA is proud to introduce the Premium Series, featuring high-quality headsets and bottom brackets meticulously designed to meet the demanding needs of today’s bicycle constructors and customers. Precision CNC products and high-quality bearings are the key points of the brand new Premium Series, developed to reach better customer service and the highest level of performance. Premium BSA bottom bracket to suit road MegaExo 24mm cranksets. High-quality bearings for minimum friction and maximum durability. Precision CNC. High-quality bearings. Crankset standard: Mega Exo 24mm. Frame standard: BSA 68mm.