Chain and sprockets have to work in perfect harmony: this is why the profile of the Ultra-Drive teeth is optimised.The result is perfect synchronisation, action and rapid shifting_x000D__x000D_
.**Technical Specifications:**_x000D_
_x000D_
* steel_x000D_
* Ultra-Drive_x000D_
* single sprockets_x000D_
* galvanized_x000D_
* supplied with lockring_x000D_
* Weight: 258g