CeramicSpeed BB ALPHA Bottom Bracket - T47 73mm For SRAM DUB Spindle MTB BLK Model-Tantalus with Power Supply Micro Drive II chainrings are

Micro Drive II chainrings are compatible with 1-piece and 22mm 3-piece BMX cranks

USB-C fast charging and power pack charging

370 Helmet Certifications Complies with the U

Yellow Padding Foam Size Medium

CeramicSpeed BB ALPHA Bottom Bracket - T47 73mm For SRAM DUB Spindle MTB BLK Model-Tantalus with Power Supply Micro Drive II chainrings areA bottom bracket built to outlast your frame BB ALPHA features hardened stainless steel races hand built with grade 3 Silicon Nitride ceramic balls custom engineered seals and precision dust covers delivering up to 500% better moisture protection while still providing ultra low friction performance. The simplified spacer tube design and lighter 7075 aluminum cups ensure quick installation and a 10% weight reduction over previous generations. All