The PressFit GXP bottom bracket is a variant of the external bearing bottom bracket. The bearing cups press into the frame instead of threading in. PressFit GXP bottom brackets work with Quarq and SRAM GXP cranksets and power meters. They do not work with cranksets from other manufacturers that use a 24mm spindle.
BB/Frame Interface: BB86/92
Spindle Interface Type: TruVativ GXP
BB Shell Width: 86mm
Material: Nylon (cups), Stainless Steel (Bearings)