DescriptionThe wheel is made of 7005 aluminum alloy, which is lightweight and durable. It fits most bicycles' rear derailleur of 13 teeth in the market. It must be the best replacement and choice for your beloved bike.Features- Color: Black. - Material: Aluminium alloy. - Size: 5 x 5 x 2 cm. - The derailleur is made of 7005 aluminium alloy material, lightweight and durable. - Unique design of the perfect tooth ratio is more beautiful and special. - The steel bearing has good performance than plastic ones, rolling smoothly, low chance of getting chain stuck. - Positive and negative tooth guide wheel can effectively inhibit the horizontal swing of the chain, so that the is more accurate. - Apply for most rear derailleur of 13 teeth in the market. A must-have replacement part for your bike.