Converts non-threaded 46mm press-fit BB shells to accept most 24/22mm (GXP) spindle cranks without the need for adapters Enduro ABEC 5 Angular Contact sealed bearing in drive side cup Enduro ABEC 3 sealed bearing in non-drive side cup Dual silicone seal keeps the contamination out 68/73mm PF30 Sram GXP 24/22mm Alloy 153g Black