TravelSafer has developed their digital tire pressure gauge to be used on cars, trucks, motorcycles and bicycles

According to a 2010 Rubber Manufacturers Association study, only 17 percent of vehicles had four properly inflated tires and 55 percent of vehicles had at least one under inflated tire. News here http://prsync.com/travelsafer/under-inflation-of-tires-is-costing-us-drivers-money-902789/