The Allen Sports Bike Frame Adaptor Model 900B is a versatile accessory designed to securely attach a bike rack to the top tube of your bicycle frame. With a sleek black color and compact design, this adapter is compatible with a universal range of bike frames and provides a sturdy support for attaching a bike rack or carrier. Made by the reputable brand Allen, this adapter weighs 2 lbs and offers a convenient solution for transporting cargo or storing bikes securely during travel. The 1.25-inch height and 3-inch width ensure a stable and secure fit for a variety of bikes. Thanks for shopping!