MINI Mechanical Speedometer with Black Interface M=2.1 Ratio for Harley and Custom Motorcycles 2-1/2" MINI Mechanical Speedometer with Black Interface M=2.1 This high quality mini speedo measures 2-1/2" overall in diameter (2-1/4" face) and 2" long.Clean custom style.2240:60 Ratio Features:Illuminated face Polished stainless housing and bezelmechanical odometer160mph faceChrome mounting clampWill fit any motorcycle or a custom project. *Product ID = 73