CeramicSpeed is the market leader in high-end performance components. This Ceramic Bottom Bracket delivers excellent low bearing friction with superb durability. Unique CeramicSpeed ceramic bearings are premium quality, out-performing mark rivals. The CeramicSpeed Ceramic Bottom Bracket system is so stiff and efficient that additional spacers are not required. At a fantastically lightweight of 84 grams, this CeramicSpeed Ceramic Bottom Bracket is a premium upgrade that your trusty steed deserves.