The heart of the ADAPTRAC system is the control valve. This is the user interface. A unique v-groove on the back allows for mounting options on the handlebar, stem, top tube or even down tube if necessary – for easy reach while riding. Two individual toggle levers facilitate the independent pressure adjustment of the front and rear tires. Simple O-rings are used to securely mount the valves and gauges. Push-in fittings attach input and output tubing and small barb fittings are used for connecting the pressure gauges.