Bikers Choice Mini Speedo With LED Indicator Light - 2:1 Drive Ratio 76067 2-1/2 diameter with black face/white L.E.D. 0-140 MPH Cable driven Features accumulated mileage, Trip 1 (check total mileage for full gas tank, can be reset to zero) and Trip 2 (calculate mileage from A to B destination, can be reset to zero)