... Pulley Bolts For MTB road bike Materials: Titanium Gr2,Gr5(6Al4V),Aluminum 7075-T6,6061-T6 Al Aluminum Rear Derailleur Pulley Bolts ... For MTB road bikeMaterials: Titanium Gr2,Gr5(6Al4V),Aluminum 7075 ... for Rear Derailleur Pulley 11TMaterials: Titanium Gr2,Gr5(6Al4V),Aluminum 7075-T6,6061-T6Spec: 10t 11T 12t Treatments: Polished ...