SRAM Eagle 90 DUBForged aluminum crankarm with 8 bolt T Type chainring compatibility Stamped steel chainring for maximum durability Two independently removeable composite bashguards shared with GX and X0 DUB Wide spindle for 55mm chainline SRAM Model ID: FC 90 A Attributes BB Inclusion No BCD Direct Mount Chainline 55mm Crank Spindle Diameter 28. 99mm Crankset Material Aluminum Drivetrain Spacing Boost Interface DUB Pedals Thread 9 16'' Primary Color Black Speed 12