These are available in two different versions

SHIMANO ULTEGRA - 11-Speed - HG-EV - Road Cassette Sprocket System engineered for use with the SHIMANO ULTEGRA R8000 groupset

The SRAM Rival 1 rear derailleur is engineered for smooth

Caliper is crafted from forged aluminum

Optimized for analog and electric drivetrain compatibility

TRUVATIV / SRAM PowerSpline Bottom Bracket - English BSA - 73 x 118mm sale These are available in twoThe SRAM PowerSpline bottom bracket features a proprietary spline design used with many OE spec moderately priced TruVativ cranks. Crank bolts are included Heat treated chromoly 12 spline spindle to make sure it can go the distance with even the most demanding riders