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Old 03-10-2009, 12:04 AM   #29
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received a request the part number for the centramatics for airstream tt # is 300-556. these can be ordered on the phone or on line (centramatic.com) . i got mine in three days. ups is one of the better shipping companys here.
thnx al
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Old 03-10-2009, 03:03 PM   #30
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Great information everyone!! Centramatics sounds like a great idea, while I am not going to try that at this time, it is something I want to read up more on and possibly do in the future.

I like the "Road Force" balance idea, thanks Robert. I just talked with a tire dealer, actually, the same tire dealer I bought my tires from and had an interesting conversation. First I asked if they had the road force balancing equipment (which I checked on-line first, there is a dealer look up tool to see who has this equipment here is the link: Hunter GSP9700 Wheel Vibration Control System ). When the guy found out that I had a travel trailer, he said that he doesn't even have his tires and wheels balanced for his TT... I told him that was fine but that I wanted to have mine done and "road force" balanced so that is what I am going to have them do tomorrow. It's only $20 per tire and I figure I am going to be much better off doing this than not having done it and then just hope and pray that the drums are okay as I could not find anyone who could or would blance those.
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Old 03-10-2009, 06:12 PM   #31
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Thanks Andy!

Maybe you SHOULD become a Centramatics dealer....looks like there is a need for sure!
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Old 03-10-2009, 06:26 PM   #32
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Thanks Andy!

Maybe you SHOULD become a Centramatics dealer....looks like there is a need for sure!
I plan on it as soon as I get back from my trip.

We should have them right at the end of March, and, at a real good price, too, along with "no shipping charges."

Andy
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Old 03-10-2009, 09:17 PM   #33
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Drum Balancing

My take on this is that I would buy new drums and take them to a machine shop with a crankshaft balancer. I'd have them balance all four to zero. In other words, the hubs themselves would be perfectly balanced.

Then I'd get my wheel & tire combinations spun balanced.

Balanced wheels&tires + balanced drums = SMOOOOOOTH!

With that, you should be good to go.

I actually have an old static balancer that I got from an old gas station that went under. I could set a hub and wheel/tire assembly on there and balance it. But to date, I've not balanced the hubs. I have had my wheels & tires spun balanced and my rig tows very smoothly. I have pictures on the walls hanging on residential style hooks and they don't bounce off. Also did the "Wife Test" where I put her in the back with a cell phone and went down the road and she said it rode just fine.

But, I'm running an Avion and it has a different suspension setup than Airstream. I'm using swing arm type suspension and maybe that's more forgiving than the rubber torsion type? I really doubt that it is. All I know is...it is utterly foolish to think that you need to balance the gear on your truck but not on your trailer. When I bought my six new tires, the tire place looked at me like I was nuts, but I insisted on spin balancing them. As a result, she runs smooth. If a tire on any vehicle isn't balanced, it will vibrate, and that is bad.

ALWAYS BALANCE!

see ya on the road smoothly,
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Old 03-10-2009, 09:46 PM   #34
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My take on this is that I would buy new drums and take them to a machine shop with a crankshaft balancer. I'd have them balance all four to zero. In other words, the hubs themselves would be perfectly balanced.

Then I'd get my wheel & tire combinations spun balanced.

Balanced wheels&tires + balanced drums = SMOOOOOOTH!

With that, you should be good to go.

I actually have an old static balancer that I got from an old gas station that went under. I could set a hub and wheel/tire assembly on there and balance it. But to date, I've not balanced the hubs. I have had my wheels & tires spun balanced and my rig tows very smoothly. I have pictures on the walls hanging on residential style hooks and they don't bounce off. Also did the "Wife Test" where I put her in the back with a cell phone and went down the road and she said it rode just fine.,

I think your static balancer idea is good except. Make sure you mark which wheel goes with which drum and also which stud goes through which hole on the tire rim. They have to be matched up the same way as they were when you balanced them. This could possible make the whole set-up even more out of balance.

I think your machine shop idea would work much better. Balancing each seperately.. that way it wouldn't matter which tire goes with which drum and the drum-tire rim matchup.
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Old 03-11-2009, 07:56 AM   #35
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I plan on it as soon as I get back from my trip.

We should have them right at the end of March, and, at a real good price, too, along with "no shipping charges."

Andy
Ok...... I'm convinced!!
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Old 03-11-2009, 09:07 AM   #36
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Question - if I got centramatics and installed those, would I also need the balance weights on the tires/wheels or need to remove those?
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Old 03-11-2009, 09:29 AM   #37
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"I plan on it as soon as I get back from my trip."

Andy,

Would you mind posting, as soon as they are available. I think you're going to get orders quickly.....before some of us start our Summer travels.

Chief
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Old 03-11-2009, 09:47 AM   #38
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Question - if I got centramatics and installed those, would I also need the balance weights on the tires/wheels or need to remove those?
Matt,
From what I read on their web site I do not think you need to remove any existing balance weights. If your tires/wheels are already spin balanced I think the centramatics would just fine tune the balance.

But then again I could be totally wrong.
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Old 03-11-2009, 11:00 AM   #39
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Matt,
From what I read on their web site I do not think you need to remove any existing balance weights. If your tires/wheels are already spin balanced I think the centramatics would just fine tune the balance.

But then again I could be totally wrong.

I can verify this to be true as I called them and asked this very question. The Centramatics will work equally well with or without the weights.

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Old 03-11-2009, 08:45 PM   #40
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My understanding is as the tires wear, they go out of balance, so the Centramatics help there.

Sounds like getting running gear balanced is much more an issue with older trailers with two or three part brake drums. At least that makes me feel better.

I can see how Centramatics are a good idea, though not sure whether it would be necessary to balance the tires or not if using them. Now I know why I find paint marks on the wheels—probably the running gear was balanced and it was marked and now I know to make sure the wheel is put on in the same place if removed.

Gene
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Old 03-12-2009, 06:48 AM   #41
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. . . Now I know why I find paint marks on the wheels—probably the running gear was balanced and it was marked and now I know to make sure the wheel is put on in the same place if removed.

Gene
If the paint marks are red and yellow dots, they mark the part of the tire with the maximum weight imbalance and the maximum runout.

They are used for match-mounting the tire to the wheel, by offsetting the corresponding weight or runout points on the wheel.
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Old 03-12-2009, 09:42 AM   #42
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Thanks Carl & Torii - I just had the tires/wheels balanced yesterday, I may consider getting the centramatics, as soon as Andy lets us all know they are carying them.
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