Wheel balancing questions

[Stiles97]

So I got my new wheels ( 5th gen 17" ) and tires ( duratracs ) mounted up. I didn't have time to balance them myself so just ran them down to discount and had them done. Since then I have had a shimmy in the front end I can feel in the steering wheel. So, my question is what is the normal acceptable max weight to put on a wheel ? I see 170gr ( 6 oz ) on the inner edge and 150 grams(5.4oz) of tape on weights near the outer edge. This seems to me to be a lot of weight considering the other wheel doesn't have near that on it. Also , the weights are almost , but not completely , opposite of each other on the circumference of the wheel. So this weekend I will go and balance them myself but just wanted an idea of what's what. Maybe I need to rotate the tire on the rim? Idk. This vibration was not felt prior to this switch. Granted I had the winter tires ( soft) on before this , so the ride isn't nearly as good in general but there is something amiss. Thanks for your time everyone. Matt

 

[ian1006]

That is a ton of weight, I have balanced probably a thousand tires and that is a lot of weight for that size tire. I would take all the weights off and start again.

 

[Stiles97]

Yeah I don't think I'm going to let them try again. I will take them down to my buds shops and do them myself. Other option I guess would be some beads .... Thanks for the reply.

 

[PWD4R]

I will be honest, I had duratracs (bought them new 285/75r16) and discount ALWAYS had issues balancing correctly. At 60 or so they started to shimmy some. Didn't bother me too bad but it's just principle. I rotated every 5k miles with my oil changes. They wore very very well (they had 13-14mm of tread after 30k miles and brand new had 18 and I off roaded)


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[JRZEE2000TR4LTD]

So I got my new wheels ( 5th gen 17" ) and tires ( duratracs ) mounted up. I didn't have time to balance them myself so just ran them down to discount and had them done. Since then I have had a shimmy in the front end I can feel in the steering wheel. So, my question is what is the normal acceptable max weight to put on a wheel ? I see 170gr ( 6 oz ) on the inner edge and 150 grams(5.4oz) of tape on weights near the outer edge. This seems to me to be a lot of weight considering the other wheel doesn't have near that on it. Also , the weights are almost , but not completely , opposite of each other on the circumference of the wheel. So this weekend I will go and balance them myself but just wanted an idea of what's what. Maybe I need to rotate the tire on the rim? Idk. This vibration was not felt prior to this switch. Granted I had the winter tires ( soft) on before this , so the ride isn't nearly as good in general but there is something amiss. Thanks for your time everyone. Matt

With out a doubt a bad balance. It "might" be a bad tire too. What your describing is classic indication of mounting the tire on the shaft wrong, unevenly if you will, which literally creates a "wobble" The balancer is trying to correct that wobble. Excessive amounts of weight counterbalancing one another either in the same plane or opposite planes, as your describing, is a classic sign of this.
When I trained techs on balancer operation, I would tell them to spin the tire up without putting any dimensions and watch the tire asy for any wobble. I would usually tell them to focus their eyesight on a spot where the side of the tire and balancer are closest and look for any in and out motion, or up and down, which is no good and will result in bad readings. Then the tire needs to be remounted and spun again until wobble is gone. If it doesn't go away then the cones, spindle nut or even the balancer shaft need to be looked at for any issues. Of course, the rim could be bent or the tire could have a bad belt.

Lastly, I should mention that the OEM rims on our trucks are Lug centric, which requires a special adapter. Tire techs hate these things because it entails a lot of setup to use it. Fortunately the OEM rims are made with a high degree of intolerance, and are machined with a nice bevel on the inner side of the center hole which allows for effective back coning of the wheel asy.