Rear Derailleur Hanger Mech Gear Drop out for DECATHLON Rockrider BTWIN Fitness Facet Triban Fit Mach Ultra Tail Hook Dropout

High-concerned chemical：None Derailleur Groupset Type：Electronic Derailleur system Gears：12 Speed Material：Alloy Type：Rear Derailleur Brand Name：GANOPPER Origin：Mainland China Components：Derailleurs Color：Black ,Red Feature 1：bicycle derailleur hanger Feature 2：patilla de cambio trasero mtb Feature 3：pata de desviador trasero Feature 4：desviador trasero bicicleta Feature 5：cambios bicicleta mtb

High-concerned chemical: None Derailleur Groupset Type: Electronic Derailleur system Gears: 12 Speed Type: Rear Derailleur Brand Name: GANOPPER Origin: Mainland China Components: Derailleurs Color: Black ,Red Feature 1: bicycle derailleur hanger Feature 2: patilla de cambio trasero mtb Feature 3: pata de desviador trasero Feature 4: desviador trasero bicicleta Feature 5: cambios bicicleta mtb