TireGard™ Tire Pressure Monitoring System is designed specifically to support two tires and maximize your riding experience. Completely wireless with unique valve cap sensors for real time monitoring, this hot new item is also compact and lightweight. TireGard™ comes equipped with a User-Friendly Graphic Interface that enables the rider to easily understand and maintain the motorcycle in safe condition. TireGard™ is fully adjustable to fit your riding style and comes with an anti-theft option. TireGard™ helps maximize fuel efficiency and safety by eliminating riding on under-inflated tires. Installation is a breeze and does not require tire removal. Simply remove OEM valve cap and replace with the included valve cap sensor, turn on the handheld device and ride. We recommend use with metal valve stems. Rubber valve stems do not last as long as metal depending on age and quality. Clearance of the sensor on the valve stem needs to verified that will clear calipers and other components befor using. (specific concern on Harley Ultras).