Praxis T47 Internal Bottom Bracket for Shimano, 85.5mm Road / 73mm MTB shellStiff, secure, and light weight with a threaded design that compliments any high performance frame. This internal bottom bracket is engineered to install cranks into T47 frames with precision. The construction features machined aluminium cups and high quality bearings to ensure a smooth, reliable interface and ease of maintenance over time. Black finish Internal bearing profile Enduro steel bearings Brand: Praxis Works Crank Compatibility: Shimano