Zodiac's Prime Clocks and ThermometersGZP Chr Prime steering stem thermometer Cased in a beautiful chrome or black CNC aluminum housing, these water resistant instruments are easy to install and functional accessories with a luminous display. Clock is battery operated, whereas the thermometer measures the ambient temperature in both Fahrenheit and Celsius. They are secured with a set screw and simply fit over the hex steering stem nut on most Harleys with 39mm forks, as well as many other