MTB Mountain Bike Bicycle Rear Derailleur Hanger Extension Extender Road Bicycle Cycling Frame Gear Tail Hook Extender Accessory

Specifications:
Material: Aluminum Alloy; 
Color: Black, Red, Gold, Blue,Silver; 
Size: Approx. 44.8*22mm/1.76*0.86''; 
Weight: about 10g (including screws); 
 
Features:
Used for rear derailleur extension, apply mountain freewheel 40T / 42T / 46T / 50T, or  32T / 36T Road flywheel. 
Expand the flywheel speed change more smoothly. 
Five colors available, give your mountain bike a little individuation. 
Aluminum alloy material, CNC workmanship, solid and firm, very durable. 
Great accessory for cycling enthusiasts. 
 
Packing Included:
1 x Bicycle Rear Derailleur Hanger;