Exercise bike by Dynamic Fitness, R1 Pro SPK-21S. This is the quietest and smoothest exercise bike on the market. The computer tracks time, distance, calories burned, rpm speed, and pulse. The seat and handlebars are fully adjustable to accommodate all height and size types. The design is streamlined, ergonomic, and durable. It has heavy duty rollerblade style wheels for easy transport and storage. I upgraded the seat, made by SE, for a more comfortable and enjoyable ride. This bike is in mint condition and rarely used. Must see and test ride to fully appreciate. Will trade for gold or silver of the same value.