This product provides the same outcome as our PressFit 4624 bottom bracket, which is taking a PressFit30 frame (BB width 68mm, BB ID 46mm) and allowing use of a 24 mm crank spindle. But this is a PressFit 4630 bottom bracket with the Enduro reducer to 24 mm. Instead of being alloy the cup is Delrin and can be a good choice for riders that do want the ability to use the bottom bracket in the future with a 30 mm spindle.