17TH Oversized pulley wheel System KACTUS

*Suitable for SHIMANO DA9100 DA9150 R8000 R8050 transmission

*12/17T super large size guide wheel set system

*Saves 45% chain friction resistance compared to 11T guide wheels

*Ceramic bearing version saves more than 2.2 watts of average power compared to the original transmission system

*Full carbon fiber cage

*Full 7075 aluminum alloy CNC cutting lightweight guide wheel and TC4 titanium alloy spindle

*Ceramic bearing version   Ceramic Bead Bearing Version NSK Steel Bearing Version

*Weight: 17TH: 55g

*The ceramic bearing version is 1.2 grams lighter than the steel bearing version