Pivot is the first frame manufacturer of its kind to feature a 92mm wide bottom bracket shell with internal Shimano XTR bearings. There are no external washers or threads in the shell. The bearings are housed in light composite resin cups with a full sealed sleeve to keep out the elements. This design allows for easy crank installation with no frame facing or special spacers required. Chain line is perfectly optimized and as an added plus, the bearings are extremely easy to replace and install and have a 3 year warranty from Shimano. The system works with Shimano, FSA and Race Face cranks.