The Uberbike SRAM DUB compatible bottom bracket is designed for use with BSA threaded 68/73mm frame types with DUB style chainsets featuring a 28.99 spindle diameter. Chainsets with 30mm spindle diameter will not be compatible with the Uberbike DUB bottom bracket. Features - Stainless steel bearing with outer weather shielding. Lightweight CNC machined alloy cups and centre tube with anodised finish. Weight 97g. Requires 12 point 46mm OD installation tool.