[Gaz64]

Adding to Bob's info above, I'll tell you a story about wheel balancers.

We had a new Balancer installed a few years back.

My argument with the tech who showed us how to use it was: "You have got 2 zeros, so remove the wheel and refit it to the balancer, and it should spin up zeros again".

He says no. Sure enough the machine says the wheel is wrong now, so rebalance again. So, in which instance was the wheel correct, if ever?

Thank god, my type of work didn't involve using it.

On rear wheel drive cars, your front wheels should rotate by hand and then stop on their own at different places, if they slow and then roll the other way, that is a heavy spot.