SHIMANO DURA ACE 7900, Sprocket Box, Grey, 11 25 Teeth

Shimano Dura-Ace CS-7900 – Bicycle Box – 10 Speed Computer designed tooth configuration with contoured shift gates They allow smooth movement, even under heavy load Close ratio gears for more efficient use of energy through better cadence controlRPA2023202058 IT Larger Small Sprockets are mounted on a lightweight alloy support to improve rigidity and reduce weight