Features:Bike rear derailleur hanger can protect your bike from injure when falling down.It is used for lengthening the rear chain and is a great accessory for cycling lovers.Bike frame gear tail hook enables lower gearing for both road bikes and mountain bikes.Easy to install. Installation can be done in less than 5 minutes.Specifications:Material: Aluminum AlloyColor: Silver ToneSize: 6.7x3.9x0.8cm / 2.64"x1.54"x0.31"(L*W*H)Thread Size: M8 x 0.75Hole Size: 1cm / 0.39"Nut Internal Thread Dia.: 0.7cm / 0.28"Derailleur Hanger Internal Thread Dia.: 0.9cm / 0.35"Package Includes:1 x Bike Rear Derailleur Hanger2 x Nuts.
eBay