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  1. #1
    Junior Member
    Join Date
    Aug 2011
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    2

    Road force balance or "match mount"

    I just talked to a local tire shop and explained that I wanted to have my tires balanced on the Hunter Road Force machine. I have a slight shimmy at 50-60 mph on my stock LJ. I asked them if they unmounted the tires and rotated them to match the high and low points of the tire and rim. That was what my understanding of what a road force balance was. He said that that process was called a "match mount" and would cost about $30 more. My question is if a standard Hunter road force balance does not do this what does it do that is different than any other balancing? Should I go for the "match mount"?

  2. #2
    Junior Member
    Join Date
    Aug 2011
    Posts
    3
    Road Force balance has a roller that puts a load on the tire as it rotates on the machine. This simulates actual road conditions on the tire and allows for more accurate balancing. It will not normally include breaking bead and rotating the tire on the rim.

    When confronted with a severe out of balance condition, a good shop will break the bead and shift the tire around until the best tire/rim balance is achieved. This has been done on several of my tires over the years and I don’t remember ever paying extra for it. Some shops will just continue to add weights until they get a “balance”.

  3. #3
    Junior Member
    Join Date
    Aug 2011
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    6
    ^yup

    If you specifically requested them to break every bead, I can understand why they would charge you. When I did tires my rule of thumb was on a reasonable normal tire 2oz of wieght was my limit before I broke the bead and rotated it. I never charged extra, if the tire needed to be rotated.

  4. #4
    Junior Member
    Join Date
    Aug 2011
    Posts
    6
    Quote Originally Posted by twistedcj View Post
    ^yup

    If you specifically requested them to break every bead, I can understand why they would charge you. When I did tires my rule of thumb was on a reasonable normal tire 2oz of wieght was my limit before I broke the bead and rotated it. I never charged extra, if the tire needed to be rotated.
    2 ounces per side or 2 ounces total?

    Here is what the tech said was added to each tire.
    LF 1.50
    RF 1.00
    RR .75
    LR .25

    I only drove about 5 miles after that. I didn't notice bad vibration beween 50 and 60. But it wasn't something I always would notice before. Te tire noise seemed to be lessened between 30 and 40. It used to make a lot of noise when the doors were off. I'll have to test that soon.

  5. #5
    Junior Member
    Join Date
    Aug 2011
    Posts
    6
    Well that low of numbers you tires are as good as they will get, Unless they didn't do anything at all to them. Might look into some steering components and see if the track bar is tight. You can always rotate your tires to see if it still happens, If it does its not the balance, Or they all are out of balance.
    If it did come down to that it would be worth the money and id make sure they were 100% perfect. Sounds like you live in a area with tire tards who have no clue what they are doing. Good luck, Dont pay them one cent until you drive it and make sure they are balanced.


 

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