The spindles are manufactured for Stages Cycling by Full Speed Ahead, forged and machined out of aluminum to allow for the carbon Stages Power meter to be used with Sram BB30 road and Sram BB30 mountain bike (168mm Q-factor) drive side cranks as well as Race Face Next SL cranks. The Stages Power BB spindles are specifically designed to meet or exceed the performance of the manufacturer’s stock component, while allowing the retrofit of the new Stages Power Carbon to a rider’s SRAM or Race Face drivetrain.