Here's the dynamic tyre balancer I use.

It's screaming 60's! and it's bloody heavy.

The instruction manual has a picture of a '66 full size Ford on it, if that's a clue to the age.

This is the pickup, usually most tyres will balance just fine if you centre the weights in the rim, so you just place this directly under the control arm nearest the lower ball joint. The strobe light triggers only when the vibration pushes the plunger inwards then releases.

I place a piece of brightly coloured tape on the tyre as a reference, as the heavy spot moves at the bottom of the tyre it causes the strobe to flash, where ever the tape is at this point is your reference and you place the weight at the top of the tyre.

Very rarely do you get a heavy spot on the side wall, but if you do you can upright the pickup and place on either side of the spindle and use the strobe to note the location to place the cancelling weight.

This the drive motor, it's 220 VAC as it requires a bit of power to spin up a tyre on a car. I'm sure OSHA would have a panic attack if they saw this in operation still. I did measure the RPM of the wheel it was spinning and with the circumference of the P255/50R17 wheel it worked out to be just a tinge over 140 MPH.

It's a little unnerving with your face so close to a tyre spinning that fast. Obviously you wouldn't want to exceed the tyres speed rating. But since our 1996 Impala SS will do 135 MPH at this high altitude, it does have tyres rated for 168 MPH. A tyre even spinning at 140 MPH does make some eerie noises with the air.

It reminds of hand propping airplanes, although I can't think of anything more intimidating than standing in front of a 150 horse power 74 inch human blender hand propping it. I don't miss those days.

You can use this balancer for other things as well. You don't have to use the drive motor because as soon as you plug it in the strobe and pickup are active. The pickup is so sensitive if you walk heavy footed near it even on concrete it will flash. But I've used this to balance propshafts on a car. Just place the pickup near the pinion on a differential to balance one end, then under the tail shaft of the transmission on the other end and use the car to spin up the drive line. It will show you the heavy spots on the shaft.

Note: Another story about the Alemite Model 7064 Tire Balancer