Replacement parts for an elliptical or stationary bike can be purchased from the manufacturer of the equipment, such as Horizon Fitness. Online distributors, such as Sportsmith and Fitness Plus Equipment Services, also offer a large supply of replacement parts and equipment.
Sportsmith is an online supplier of replacement parts for elliptical machines, bikes, treadmill decks and treadmill belts. Additionally, they offer a variety of strength, group exercise and training products for commercial and individual sale.
Fitness Plus Equipment Services offers brand name manufacturer's parts for elliptical machines, treadmills and steppers. Brand names they carry include Horizon, Keiser, Nordic Track, Schwinn and StairMaster.