BB90 kit ABEC3

This is the upgrade bottom bracket for your Trek BB90 or similar bottom bracket with a shell width that measures at 90 mm and an internal diameter of the bottom bracket shell of 37 mm. Note that with these frames you cannot use a crank with a 30 mm crank spindle. All the options here are for 24 mm spindle or GXP. We offer options from steel through the top of the line XD15.