Bulldog Gear - Spirit CU800+ Upright BikeSpirit CU800+ Upright Bike The CU800+ Upright Bike was specifically engineered for the commercial environment, from its heavy duty steel frame to its durable powder coat paint finish. Features like built in hand pulse sensors on the multi position handlebars, as well as the easy to read console with a variety builtin programs, satisfy casual and committed users alike. The extra smooth ride comes from the perfected gearing and the integrated generator