Converts non-threaded 46mm press-fit BB shells to accept most 24mm or 24/22mm spindle cranks For installation into PF30 frames without the need for adapters Enduro ABEC 3 sealed bearings Dual silicone seal keeps the contamination out 68/73mm PF30 Shimano HTII 24mm Alloy 153g BlackUPC/EAN/GTIN: 811079020253