Fits:
Shimano Ultegra 8000/8100 series DI2 & MECHANICAL

Shimano Dura Ace 9100/9200 series DI2 & MECHANICAL

FEATURES:

Cnc machined parts and cage plates.

12T +16T pulley wheels 

Full Ceramics Performance Bearings

Full ceramic bearing races ensure

Unrivalled reliability and performance.

All units hand assembled in the UK.

2 year warranty*