The Allen Sports Bike Frame Adaptor Model 900B is a universal black aluminum cross bar designed to attach to the top tube of a bicycle frame. With a length of 20.5 inches, height of 1.25 inches, and width of 3 inches, this bike frame adaptor is lightweight at 2 lbs. It is suitable for various types of bikes and is a useful accessory for transporting bikes on bike racks or carriers.
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