Bike Bicycle Rear Derailleur Guard Rack ProtectorNote: Please check your rear derailleur size.Features of Bike Bicycle Rear Derailleur Guard Rack Protector Application:Provide effective protection for rear derailleur, prevent the derailleur was struck distortion or displacement in riding. | Size:115 X 54 X40 mm/4.5 X 2.1 X 1.57 | Easy to installed:..