Balance or not to balance drive tires - Luxury Coach Lifestyles
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Old 09-11-2012, 02:17 AM   #1
Dom Ferris
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Default Balance or not to balance drive tires

Yesterday I went to check the price on two drive tires. I asked the salesman about balancing the tires and to my surprise he said it's up to me. He said they usually don't balance drive tires on trucks. Can I get some feedback from those of you who have done it (either way) and let me know what you recommend? If it's really not necessary, then why pay for it, but I do like a smooth ride. How noticeable is it with or without the balancing?
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Old 09-11-2012, 04:15 PM   #2
The Newell
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We balanced all of our tires, including the drives on our previous coach(currently coach less searching for our next). My thought is, if it isn't balanced there could be extra vibration and movement that might harm some of the axle components. It just seems the less constant vibration that those axles have the longer the life of those expensive items.
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Old 09-11-2012, 04:17 PM   #3
ccjohnson
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Dom,
I used to not balance my trailer tires to save $$$. After I started balancing all tires (even trailer tires) my repair bills dropped significantly. Not to mention smoother ride. The constant vibration from a slightly out of balance wheel can not be helpful to bearing & seal life, as well as suspension components.
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Old 09-11-2012, 04:30 PM   #4
prairieschooner
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We had our tires balanced and have not regretted the decision. Yes, more $$ and not all shops can spin balance. Our '82 rides smooth and I am sure that the steering gear and bearings will last longer.
Come to think of it the Oil Bath for the front tires did have leaks prior to the re-sealing that I performed.
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Old 09-11-2012, 08:07 PM   #5
NewellCrazy
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For whatever it may be worth, I would go so far as to suggest that not only should ALL tires be balanced, but go further and have them checked for roundness also. Smooth is nice. Some might be suprised how out of round your brand new tires may be.
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Old 09-11-2012, 08:18 PM   #6
tuga
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Sean,

How do you check a tire for roundness?

I have never heard of that.
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Old 09-11-2012, 08:27 PM   #7
NewellCrazy
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Hi Tuga,

What you do is write down the symptoms you notice when driving if any. This could include vibrations, steering pulls and alignment problems. The more specific you are the better in diagnosing the problem quickly. Notice where the vibration is coming from and possible other strange things that are occurring with the steering, braking or wheel systems of your vehicle.

Air the tires to the recommended levels and do a road test. Notice if the vibration is through the steering wheel or through the floors and seat. If it is through the steering wheel, then assess what have been changed lately--wheels, tires or if the vehicle was serviced.Check to see if the wheels and tires run true. Look at the tire to see if there are any flat spots and note whether you have locked the brakes up lately. These episodes can cause the tire to go out of round, meaning the tire must be replaced immediately.



Double check your suspicions by measuring the radial runout with a dial indicator. This is done by measuring the difference between the highest and lowest parts of the runout. The difference should be no more than half an inch; if so, then it is indeed out of round and needs to be replaced immediately.
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Old 09-11-2012, 09:24 PM   #8
prairieschooner
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When they spun balanced my tires they also checked for roundness. They rotated the tires to get them balanced and ensure roundness.
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1982 Newell 38' (built before #1) 6V92 DD, 5 Speed Allison, 12.5 KW Kohler, Couch used to make into a Bed but I fixed it!
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2007 Yukon, 1981 CJ7 Laredo, 2002 Honda CRV, 1955 Thunderbird, 1952 Pontiac Sedan Delivery, 1952 Ford 8N, 1958 Airstream, 1959 Glasspar 16' Avalon, Cabin in the Woods........what will I work on next
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Old 11-02-2012, 09:03 PM   #9
Michael Martinkus
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I wrote this on my blog today. Thought you migh find it interesting...

Have you ever had your tires balanced but were not totally satisfied with the outcome? It can become a frustrating experience at times if you have to return to the tire shop over and over trying to get a smooth ride especially if it is a new set of tires that seem out of balance.

Many times the cause is not that the tire(s) is out of balance but that it is out of round. When repeated attempts to balance fail, what the tire tech should be doing is checking run-out on the tire to see if it is oval shaped and if it is, can the lopsidedness can be corrected by rotating the tire 180 degrees on the wheel. Tires are seldom, if ever, perfectly round and the same is true for wheels. If the tire is mounted on the wheel in such a way that the "high" spots of both are aligned and the spots are high enough nothing will make the ride smooth. Rotating the two highs so that they are aligned 180 degrees from each other will many times minimize the problem.
There will always however be high spots and to get a really smooth ride what is needed is to "True" the tires. This involves either jacking the tire up while still mounted on the vehicle or placing the tire and wheel onto a machine that spins them while a "Shaving" device actually shaves off the high spots and making the tire round.
A note of caution here: Many RV's now days have 22.5" wheels and lots of those are cast aluminum. There are two different ways that these wheels are "piloted", either by the center hole or "Hub" or by the wheel studs. "Piloted" means the machining of the outside edge of the wheel where the tire mounts was machined true relative to either the hub or the studs. So if the tire shop that trues your tire is removing the tire and wheel assembly to mount into a machine for the shaving, they will need to know which way the wheel is piloted. They can usually do this with a visual inspection but it is critical in that if the hub piloted wheel is mounted and piloted by the studs in the truing machine, (or the other way around), the tire may not actually get trued and you will loose a little of your tire tread in the process.
I have actually had this happen in a shop near Atlanta. We had a vibration in a large motor home and after futile attempts to balance the tires we decided to send them out to a truck tire shop for truing. To save time we removed them and trucked them to the shop and retrieved them when finished. We remounted them on the coach and had the same vibration as before. We knew that they had trued the tires because you can see where the rubber had been shaved on each tire but just to be sure we called on a mobile balance/true tech to come check them out. He set up with the tires and wheels still mounted on the coach and started shaving rubber off the first tire. I asked how that could be if they had just been trued. He said that we had Hub piloted wheels on this coach and he knew for a fact that the outfit that we took the tires to originally had a machine for stud piloting because he had set the machine up for them when they bought it! When he finished the job for us that unit ran smooth as glass. We had encountered this balance problem with this brand of motor home many times before and when I quizzed our mobile guy he said that he knew for a fact that the factory that was building this particular brand had a true machine that was wrong for the wheels.
On a different topic...ever notice how some polished wheels are lots shinier than others? Its because the owner shines them more often. Every time you shine those wheels they get just a little shinier than they were. Acid washing the wheels prior to polishing will ensure that the grit on the wheels will not get ground into the surface of the aluminum. The new wheels when finished have tiny scratches in them that can't be seen by the naked eye. When they get polished each time the ridges of those scratches are knocked down just a little bit and over many polishing s they start to disappear leaving a progressively shinier surface each time. A good looking set of shiny wheels can overcome many appearance ills. Shine em up! It's a good job for a high school-er!
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Old 11-02-2012, 10:19 PM   #10
GORDON HUMMEL
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Two additional points
From my experience in the trucking industry, drums come balanced & unbalanced. A balanced wheel & tires combo on am unbalanced drum can be a problem to find.

Back in the mid '80 I had some of the new Michelin Pliots 70 series installed on my gas Pace arrow. After a few miles they went out of balance. I went back & had the rebalanced. Samething happened again so the called in the Michelin rep as these tires were new to the industry. As it turned out the installer was using too much lube & the tires were rotation on the rim.
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