The CeramicSpeed Bottom Bracket for DUB is a great way to keep your speed consistent. This bottom bracket is made to fit SRAM DUB and has an inner diameter of 47mm and a 68mm width. It is wide and oversized and features a threaded configuration. There are CeramicSpeed bearings pressed into the cups as well. This version includes the standard steel bearings. The CeramicSpeed DUB Bottom Bracket is a great way to get the most speed out of your 68mm frame.