This almost universal 12mm diameter Wheel Sensor can be mounted on a suspension strut so that it picks up the bolt heads off the brake disk as they pass by. A minimum of 4 bolts is required, however 6 is recommended. The more pick-up's available the more accurate the tripmeter will be. It has a 1mm sensing distance.

An alternative positioning for this type of sensor is to pick up on flying tabs (minimum of 2 positioned 180* apart) fastened on the bolts of the Prop Shaft's Universal Joint.
 
This is a 3-wire sensor with a Red LED to indicate when the target is in range.
 
Cable Length: 2m
Total body length: 50mm
Total Thread length: 35mm