Proving A Top Quality Speedometer Doesnt Have To Cost A Fortune, Autometers Mechanical Speedometers Are A Great Solution For Any Vehicle With A Cable Drive Transmission. Using A 5/8" -18 Fitting On The Back And Calibrated For 1000 Rpm At 60 Mph, These Simple, Accurate And Durable Units Have Been Time Tested To Provide Great Performance And Exceptional Value.