This bottom bracket fits any Sram or Quarq GXP crankset on a T47 frame with an 86.5mm or 85.5mm wide bottom bracket shell. Although Trek T47 internal bottom brackets are 1mm narrower than the standard 86.5mm wide T47 shells, this is well within the adjustment range of any crankset. The same bottom bracket can be used for both configurations. All internal Kogel Bearings T47 ceramic bottom brackets can be installed with an Enduro TorqTite-compatible tool. Ceramic bearings Specifically designed for T47 bottom brackets