The aluminium rear sprockets are CNC machined and their special theeth (Ergal - Rycral 7075 - T6) guarantee a longer life.
Due to an additional work process he front “Supersport” sprockets are extremely light.
This proffessional XRing chain convince with his extremely strenght and provide an excellent performance.<7br>Tensile strength measured in kg: 4721 (525 chain), 3967 (520 chain). Chain sets (Chain, front sprocket and rear sprocket). 525 chain size (original).