The Hellbender 70 bottom bracket utilizes bearings made of 440C stainless steel, providing exceptional ride quality and reliability, while striking a perfect balance between value and lasting performance. Marine-grade grease and robust bearing seals complete the package in terms of durability.For use with frames compatible with 47i (Inboard) onlyFor use with DUB spindlePrecision engineered in Fletcher, NC440C stainless steel bearings with a dual lip seal and marine grease, offer durability and corrosion resistance6061 T6 machined aluminum cups are lightweight and durableItem SpecificationsBB/Frame InterfaceT47Bottom Bracket Shell I.D.47Defined ColorBlackSpindle Interface TypeSRAM DUBWeight141 Cane Creek Hellbender 70 Bottom Bracket Bottom Brackets UPC: 840226104805