Tire balancing question

joe smith · Jun 2, 2020

I just had two new front tires mounted on my 15 X 7 American mags.. Both had comparable balancing weights 180 degrees ( straight across from each other) from each other.. Does that seem strange to anyone with more knowledge about this than I??
TY

toolmanmike · Jun 2, 2020

Yes but most shops will balance and spin up the second time to check for zero. You might have to add a amall amount but it shouldn't be directly opposite. I would take them back and have them spin them again.

zyzzyx · Jun 2, 2020

Yes! The guy who balanced the wheels doesn't know what he's doing! Surprised?
No one gets the correct training these days, so that's it. Take them back and talk to the Manager and show
him what you've got. He should apologize and get it done right. I had my motorcycle tire balanced at a
Yamaha dealership once and they did the same thing. When they brought it out from the back, I said W.T.F?
They said it was no big deal. I said I'm not paying unless you do it the right way, so they stripped off the
weights and did it again. 5g in one spot this time and no vibration. Good catch!

440Coronet500 · Jun 2, 2020

Wrong, have them explain to you how it makes sense to have balance weights 180 deg. from each other? 440'

dan juhasz · Jun 2, 2020

440Coronet500 said:
Wrong, have them explain to you how it makes sense to have balance weights 180 deg. from each other? 440'

I misread it, I thought he meant he had weight on the inside and outside at the same location, my bad

MoparLeo · Jun 3, 2020

You didn't say what side of the whell they are on. The same side ? Or one inside and then 180° away the other one on the outside. A spin balancer does 2 different types of balancing when done properly. That is why you have to have weights where they are required, not just on the rear. When a tire/wheel is spinning it wants to do 2 things, one is to bounce up and down across from the heavy side of the assembly. That is static balance. The other is to try to wobble away from the heavy spot on the side of the assembly, that is called dynamic imbalance. Look up these terms to understand balancing. If you get to look at a Real race car up close, you will see balance weights on the inside and outside edges of the rims. Wobble and hop.

joe smith · Jun 3, 2020

All of the weights are on the inside of the wheel, across from each other 180 degrees ( as in a circle)…. Test drove the car last night and it seems to be fine

MoparLeo · Jun 3, 2020

If the same amount of weight is on the same edge of the rim, directly across from each other. They don't need to be there at all. That is a faulty balance job. How about a picture of your rims.

joe smith · Jun 3, 2020

MoparLeo said:
If the same amount of weight is on the same edge of the rim, directly across from each other. They don't need to be there at all. That is a faulty balance job. How about a picture of your rims.

Appreciate your help, but they are on the car...

1967coronet · Jun 22, 2020

I hate tire shops that just keep tacking on weight until it zeros.
I used to mount and balance tires as a kid , no spin , all bubble balance.
I have tried to tell these {techs???} that you have to break it down and move the tire if your nailing on lots of lead to one spot LOL.
Try telling them that the wheel has a heavy spot as does the tire, some tires will even be marked with paint dot to help these idgits.

You got to move the tire on the rim. :BangHead:

Tire balancing question

joe smith

Well-Known Member

toolmanmike

Henchman #2

zyzzyx

FBBO Gold Member

440Coronet500

Well-Known Member

dan juhasz

FBBO Gold Member

MoparLeo

NRA BENEFACTOR LEVEL LIFE MEMBER

joe smith

Well-Known Member

MoparLeo

NRA BENEFACTOR LEVEL LIFE MEMBER

joe smith

Well-Known Member

1967coronet

FBBO Gold Member

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