The term 'wheel rim' refers to the outer edge of a wheel, which is composed of three parts: the felly (5 letters), the felloe (6 letters), and the FLANGE (6 letters). The felly is the metal rim that forms the outer circumference of the wheel. The felloe is the curved wooden or metal pieces that are attached to the felly and form the wheel's shape. The FLANGE is the metal piece that connects the felly and the felloe and helps to keep the wheel together.