Shadow conspiracy stacked mid bottom bracketthe shadow conspiracy stacked mid bb kit features two precision sealed bottom bracket bearings machined 6061 t6 aluminum cone spacers with integrated shadow crow logo aluminum internal spacer and several smaller crank arm spacers to help dial in chain alignment featuresmaterial 100 cnc 6061 t6 alloy conesbearings custom shadow bearings with logo and red sealsweight 59oz for 19mm midnotes only compatible with mid bottom bracket shell framesbuy