The sram gxp team pressfit road bb86 bottom bracket is a variant of the external bottom bracket pressfit cut weight by up to 40 grams and provide easier installation by allowing you to press the bearing cups into the frame instead of threading them there39s no change to the crank spindle length and diameter remain the same on this bottom bracket sram gxp team pressfit road bb86 bottom bracket features variant of the external bottom bracket pressfit cut weight by up to 40 grams