Our standard bb systems are shimano compatible the 7075 t6 alloy cups feature cnc finishing and come polished or anodized smooth and durable the high grade bearings are fully shielded with quad ring seals compatible with most shimanot race facet and fsat external bb configurations that use a 24mm crank spindle 7075 t6 forged and cnc cups anodized in any color and also available in our proprietary liquid ano english threads standard shimano bb tool for installation 94g weight