Drivetrain Oversized Pulley System The Benefits of Oversized Innovation: Enhancing Performance and Durability New SHURIKEN TK1739R71 ZenithPulley Wheel: Upper 13T(TBT),lower 19T(Stainless)RD Compatibility: 105 Di2 R7150/R7170, 105 R7120New SHURIKEN TK1739S2 ZenithPulley Wheel: Upper 13T, lower 19TRD Compatibility: Dura Ace Di2 R9250/R9270, Ultegra Di2 R8150/R8170 SHURIKEN TK1759XS ZenithPulley Wheel: Upper 15T, lower 19TRD Compatibility: Road Red 12s, Road Force 12s, Gravel Red 12s. SHURIKEN TK1739CE ZenithPulley Wheel: Upper 13T, lower 19TRD Compatibility: CAMPY Super Record EPS 12sShareShare on FacebookTweetShare on PinterestSend via email