This movement allows the pulley to settle into an optimum position under each cassette cog.
The result is faster, smoother shifts and a quieter drivetrain.
Each pulley is machined from light and strong 7075 AL.
11T for shimano.
weight:5.8 Grams(each) for steel bearing
Color: Black,Red,Gold,Blue,Silver,Ti,Pink.
Bearing: PW1S cartridge bearing.
PW1C Ceramic bearing.
Material: 7075 anodized alloy Compatible with Shimano