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Old 02-06-2011, 01:20 PM   #1
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New Tire vibration

I have an 06 X with a 4" suspension lift. I just bought 4 new 33x10.5x15 BF GOODRICH A/T to replace 33x12.5x15. There is alot of vibrations around 20-30 miles per hour that I did not have before with the worn tires. Is it the new knobbies that is causing this, the vibration goes away or i guess becomes less noticable above 40 miles, i guess its just droneing out then!

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Old 02-06-2011, 01:27 PM   #2
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Are the tires over-inflated ( I run mine around 35PSI) and are they balanced correctly?

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Old 02-06-2011, 01:30 PM   #3
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Yeah I'd definitely check out the tire pressure, but I have noticed on a couple sets of mine the same thing and as I wore them alittle but the vibration lessened till nothing at all. If it gets worst or you start to get uneven wear on your tires take them in for balancing.
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Old 02-06-2011, 01:52 PM   #4
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they are balanced i can still see the wheel weights on them, i noticed that my rear universal joint is shot, not sure if this is adding to the issue. i am going to see if the alingment is still in spec since i went to 10.5 inch tires from 12.5. Also does a shot universal cause some squealing?
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Old 02-06-2011, 01:53 PM   #5
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something is odd , I have had many sets of BFG ATs over the years on my work trucks and have yet to find a smoother riding tire as far as balance or a problem at all . Many tire places for some odd reason think they need to put the max air presure in the tires which they of all people should know better .
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Old 02-06-2011, 03:08 PM   #6
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Just because they put weights on the wheel doesn't mean they are actually balanced.... Check the psi, the torque on the lugs, and the alignment. If that doesn't fix it you should take it back and have them check the balance on them. It's possible you have a wheel out of round too...
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Old 02-07-2011, 01:12 AM   #7
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CHECK YOUR BEADS!!!! make sure you have all tires seated against the rim properly I work for discount tire and ita easy thing to miss when installed and if they aren't your tire can explode with dynamite force. We had a tire blow and totally rip 70 percent of the side of a mobile home off.
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Old 02-07-2011, 01:23 AM   #8
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they are balanced i can still see the wheel weights on them, i noticed that my rear universal joint is shot, not sure if this is adding to the issue. i am going to see if the alingment is still in spec since i went to 10.5 inch tires from 12.5. Also does a shot universal cause some squealing?
yes...... fix it now.
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Old 02-07-2011, 02:09 AM   #9
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Quote:
Originally Posted by Dudar228 View Post
Are the tires over-inflated ( I run mine around 35PSI) and are they balanced correctly?
35 may be a bit high...if you have stock size tires, it should give a pressure recommendation inside the door I think. If it recommends 35 on the stock pressures, then I stand corrected.

I know with my 31x10.5R15 BFGs, it's recommended to run around 28 psi with them...maybe a hair lower.
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Old 02-07-2011, 02:39 AM   #10
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CHECK YOUR BEADS!!!! make sure you have all tires seated against the rim properly I work for discount tire and ita easy thing to miss when installed and if they aren't your tire can explode with dynamite force. We had a tire blow and totally rip 70 percent of the side of a mobile home off.
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