Dakota Digital Rear Wheel Speed Sensor SEN-1018 with Mounting diagram.
Clamps around axle spacer and used on most softail and rigid applications.
(FOR USE WITH HLY-30XX SERIES SPEEDOMETERS (EXCEPT HLY-3011/3015/ 3016)REQUIRES 1-3/32″ AXLE SPACERSENSORS DIMENSIONS: 2″ WIDE X 2-3/4″ LONG X 1/2″ THICKWILL NOT WORK TO DRIVE A STOCK HARLEY-DAVIDSON ELECTRONIC SPEEDOMETERMADE OF POLISHED MACHINED ALUMINUM.)