Because of the small size of the tandem market and the reluctance of some manufacturers to share production and sales data, reliable data for the market are not available. Some industry experts estimate that only 5,000 to 6,000 high-performance tandems are produced annually in the United States.
Co-Motion said it makes about 800 tandems and 200 single bikes a year. Burley, which also makes recumbent bikes, rainwear, and trailers for hauling kids or gear, said it produces 1,300 to 1,400 tandems a year. Green Gear said it makes about 260 tandems a year. Santana, which exclusively makes tandems, would not release its figures.