Give yourself some peace of mind when traveling with your bike with the SciCon Rear Derailleur Protector. This protective bike essential pulls on like a sleeve and is secured with hook-and-loop straps in seconds to offer a reliable shelter for your rear derailleur hanger and rear dropouts. SciCon implemented plastic reinforcements, double-padded sidewalls, and a rigid protective shield to cover the area of the rear derailleur hanger, putting worries at ease when transporting your bike in a soft bike bag or bike case.