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
KACTUS - 17TH - Oversized pulley wheel System with ceramic bearing
Miche - Cross Axy - Hjulsæt - HG 9-10-11
KACTUS – 17THA – Oversized pulley wheel System with ceramic bearing
TIL SHIMANO R7000
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