These multi-purpose disks can be used for the measuring of engine rotation, wheel speeds, tail shaft speed, differential speed and other rotating device speeds. The multi-tooth disks are laser cut and can be adapted to your vehicle. It is important that the trigger wheel disk is accurately machined for both height and spacing, to ensure all timing events are accurately measured. This is especially important when used as a cylinder reference trigger.

	Description	Part No
	12 tooth x 145 mm	#42007
	12 tooth x 90 mm	#42016
	36-1 Ford Trigger	#45001
	8 tooth x 145 mm	#42019