The Natural Resistance Air Fan Trainer – increases resistance naturally the faster you pedal
The Natural Resistance Air Fan Trainer —[SOURCE]— is a uniquely designed exercise bike that uses air resistance partnered with tension knob instead of magnets or frictions found on lesser models to provide the user natural yet effective training. This trainer is equipped with 17 inches in diameter fan capable of… Read More »The Natural Resistance Air Fan Trainer – increases resistance naturally the faster you pedal