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Old 02-25-2015, 08:07 AM   #1
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Firestone tires for RV?

I just purchased a 2005 Monaco Diplomat 40ft, and it has almost new firestone 22.5 tires with aprox 10K on them. I have a couple of questions, does many people install Firestone on big RVs? I have had a lot of RVs but no Firestones. I have a problem with a vibration 60-65 feeling through the steering wheel. The preivous owner said they put some kind of power which were in bags and was told the bags would break after a while. He said he had the vibrations but it stooped after a while. He was having a hard remembering, I think that is why he sold his motorhome. Any ideas would really help.
Thanks
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Old 02-25-2015, 08:17 AM   #2
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Firestone Tires

I put Firestone tires on my last two MHs and have had good service from them. They replaced Michelins which were prematurely cracked. The MHs were a BT Cruiser and A Jayco Greyhawk, both Class Cs.
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Old 02-25-2015, 08:30 AM   #3
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The previous owner had them use balancing powder.. very common with semi's... it works, but it isn't as "refined" as putting it on a balancer...

Internal Balancing Solutions

My recommendation... Do a little research with the heavy duty tire shops in your area.. ask if they have a "road force" style wheel balancer that can handle your size tire.. if so, pay the extra money to have your tires balanced... Also, you may want to ask they find the "best" two balanced rims and use them for your steer axle..

Road Force Touch® GSP9700 Wheel Balancer - The World's #1 Diagnostic Wheel Balancing Machine | Hunter Engineering Company

Also.. just for "grins & giggles"... identify the date code of the tires.. just to give you piece of mind on how old they are..

Good luck !!
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Old 02-25-2015, 08:31 AM   #4
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It could be a belt separation issue, flat spot, etc. Have a reputable tire shop inspect them. How old are the tires, could also be wheel damage.
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Old 02-25-2015, 08:36 AM   #5
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We have the FS400s on our 07 Newmar MADP for the Drive and Tag. Have Michelins for steer. Dealer put on the FS400s as part of the sale. We had two of them develop a side wall bulge with less than 5K. Firestone shop said the defect was in 1 chord and was acceptable for use. I insisted they replace them and they cheerfully did at no charge. They back up their tires which was nice to see. Goodyear/Michelin has had their share of issues as well. My experience with both of these companies has been favorable in similar situations. In the end, the coach drives exceptionally well with this configuration.
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Old 02-25-2015, 09:29 AM   #6
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I love my firestones used them for years
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Old 02-25-2015, 09:36 AM   #7
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Quote:
Originally Posted by maxwell18 View Post
I just purchased a 2005 Monaco Diplomat 40ft, and it has almost new firestone 22.5 tires with aprox 10K on them. I have a couple of questions, does many people install Firestone on big RVs? I have had a lot of RVs but no Firestones. I have a problem with a vibration 60-65 feeling through the steering wheel. The preivous owner said they put some kind of power which were in bags and was told the bags would break after a while. He said he had the vibrations but it stooped after a while. He was having a hard remembering, I think that is why he sold his motorhome. Any ideas would really help.
Thanks
if you are in dougbt about your tires, go to the truck stop and have them spun....
although bad tires are not brand specific... some are just mounted wrong...and yes, you can get tire shake by not properly mounting tires




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Old 02-25-2015, 10:28 AM   #8
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Quote:
Originally Posted by maxwell18 View Post
I just purchased a 2005 Monaco Diplomat 40ft, and it has almost new firestone 22.5 tires with aprox 10K on them. I have a couple of questions, does many people install Firestone on big RVs? I have had a lot of RVs but no Firestones. I have a problem with a vibration 60-65 feeling through the steering wheel. The preivous owner said they put some kind of power which were in bags and was told the bags would break after a while. He said he had the vibrations but it stooped after a while. He was having a hard remembering, I think that is why he sold his motorhome. Any ideas would really help.
Thanks
maxwell18

"Almost new" Firestone tires, (with only 10k miles on them), is not a reason to "re-tire" your coach....
However I would have a reputable tire shop inspect and spin balance them.

IMO, "balancing powder" is not what it's "cracked up to be"... it will not eliminate a vibration caused by a "bad tire", "incorrect mounting", "an out of round" (or "severely out of balance"), tire... or a "damaged wheel".

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Old 02-25-2015, 04:42 PM   #9
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I would remove the powder before having them spin balanced. When they are dismounted to remove the powder is also a good time to have them inspected for serviceability.
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Old 02-25-2015, 05:08 PM   #10
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Followup on tires

Just a little follow up on my orginal comment. I live in a small town and I can't just go down the street and find a tire dealer that can handle a 40 ft MH. I didn't say I was going to replace my tire, they are 8 months old with aprox 10K miles. I have to find a Firestone dealer to replace the front tires as authorized by Firestone HQ. So my plan is find somebody who can handle my motorhome, replace front tires spin balance them.
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Old 02-25-2015, 06:36 PM   #11
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I just had 6 new Firestone 1100 22.5 FS 561 all position tires installed. I had them spin balance all of them.
I just traveled 1500 miles and the coach rides and handles very nice and the tires are very quiet as well. I was a little skeptical but now feel it was a good decision.
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Old 02-25-2015, 06:52 PM   #12
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x2 on the Road force balance. If they can do it, it will tell you if there is a problem with any of the tires and depending on how they test out, a good tire guy will put the 2 best tires on the front and the worst readout tire on the far back. Well worth the cost to have it done. Unlike spin balancing where the weights are put on one side, the Road force balance will put weights on the inside and out depending on runout.
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Old 02-26-2015, 09:21 AM   #13
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Firestone is a Bridgestone brand and odds are strong that your Firestone 22.5" tires are identical to the equivalent Bridgestone model.

Dynamic balancing with an internal powder (or beads or liquid) is standard practice in the trucking industry and very reliable. The reference to "bags" is about the installation procedure. They put bags of the powder in the tire (according to tire size) and those bags are intended to break open within the first mile or two of driving, allowing the powder to circulate as needed to do the balancing. The faster you drive, the better it works. However, it is possible that a wheel may be damaged or a tire so badly out-of-round that dynamic balancing can't compensate. Spin-balancing with weights might fix that, but would require either a very large weight or several good-sized weights at multiple points on the wheel. Either of those is a sign of a defective tire or wheel and probably should be addressed with replacement rather than balancing. If a spin balance shows only the need for a modest amount of weight on one wide of the wheel, then balancing wasn't the problem in the first place cause dynamic balance (powder) would do the same thing.

A vibration at 65 could be several things and I would start with a good alignment (at a truck shop) and an inspection of the front suspension. Take a close look at the tires and wheels at the same time, inspecting for signs of damage to either..
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