- Make sure this fits by entering your model number.
- 14 g lighter than SM-BB6700
- smoother than SM-BB6700 (50 % less friction)
- small ball bearings keep weight low
- bearing cups anodized
- recommended for Ultegra FC-R8000, FC-6800, 105 FC-5800, Metrea FC-U5000, FC-CX70
This fits your .