`- Two precision machined bottom bracket cups thread together offering creak free operation, excellent bearing life, and simple maintenance\n- Fits 386EVO specific frames (46mm ID) with 86.5mm width bottom bracket shells\n- Includes anodized aluminum cups with Enduro sealed bearings\n- Angular contact: Enduro ABEC 5 angular contact bearings\n- Base: Enduro ABEC 3 sealed bearings\n- Requires a 16-notch, 48.5mm outer diameter bottom bracket cup tool, WZ-3500, sold separately