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Old 05-24-2014, 01:37 PM   #1
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New Tires now RV is squirmy/feels "loose"

Hi all! Just bought a 2003 Newmar Dutch Star and getting ready for our maiden voyage. I just took her in for new tires, got 6 Firestones and drove her home this morning with terrible squirm going down the road. Do I need to adjust air pressure in tires to make it better. It didn't do this before, road fine just pulled to the left somewhat. Now it feels like a loose cannon. Any advise. Called tire man and he said he felt it too (duh) and my best bet was to take some of the air pressure out.
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Old 05-24-2014, 01:42 PM   #2
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I bet the tire man put too much air in the tires.

Jim
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Old 05-24-2014, 01:48 PM   #3
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Do the tires have "tits" in the tread area? If so, it may cure itself in a few miles.

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Old 05-24-2014, 01:57 PM   #4
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Definitely check the tire air pressure. Too much/too little will definitely affect the handling.
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Old 05-24-2014, 02:11 PM   #5
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Quote:
Originally Posted by Papa_Jim View Post
I bet the tire man put too much air in the tires.

Jim
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IMHO, you need to weight the coach and then look up the proper inflation on the mfgr tables. You really need to get that right before looking anywhere else. I too am guessing that the tire guy inflated the tires to their sidewall PSI and it is probably too high for your rig.

FWIW, I think I'd look for a new tire guy next time if his "solution" to this problem was just to let air out and see what happens.

Rick
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Old 05-24-2014, 03:33 PM   #6
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Thanks everyone...I ran in a nice man that used to be a truck driver and he helped me check the tires, to our disbelief my "wonderful" tire man had inflated them to 130 psi and one of the outside rear was 135psi. Definitely not going back there. Will test her out tomorrow with the change. Hopefully all is good....will also do the weighing on our way out to OKC. Fingers crossed. I'm sure I'll have more questions!! :-))
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Old 05-25-2014, 12:13 PM   #7
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130 is probably the max load inflation shown on the sidewall. All too many tire dealers and repair shops now always inflate to max pressure to avoid being accused of under-inflation in an accident lawsuit. That won't change until somebody sues one of them for an accident caused by over-inflation.
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Old 05-25-2014, 04:15 PM   #8
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Places that change heavy truck tires normally inflate new tires to their maximum rating. It's just how heavy trucks run their tires. If you want them inflated to something less, you just have to tell them what.
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Old 05-26-2014, 11:50 AM   #9
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I'm a retired owner operator of 18 wheelers for 20 years and have owned 4 Motor Homes ranging from 37 ft. to 45 ft. and I have found the 125 PSI on all the 22.5 or 24.5 tires is the way to go. You will get the best wear and stability at this pressure in most all lengths of MH's.

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Old 05-26-2014, 12:06 PM   #10
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I'm a retired owner operator of 18 wheelers for 20 years and have owned 4 Motor Homes ranging from 37 ft. to 45 ft. and I have found the 125 PSI on all the 22.5 or 24.5 tires is the way to go. You will get the best wear and stability at this pressure in most all lengths of MH's.

Albert
Welcome to the forum.

Have you found this one size fits all tire inflation to be best regardless of the weight of coach?

Rick
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