robertp777
California
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Joined: 03/29/2005
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Just to clarify. The original tires were goodyear, they came with the motorhome. The only difference is that those tires were 14 ply and the Toyos M143 are 16 ply. Motorhome drove straigt and nerrow with the Goodyear and the only reason I changed tires was because the old tires were 7 years old. The feel of the new ones are that when I turn the wheel it seems like a long delay before the tires grab hold and turn, then I overcorrect its like fishtailing down the road
* This post was
edited 07/01/12 02:01pm by robertp777 *
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Tireman9
Akron, OH
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Joined: 08/16/2002
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robertp777 wrote:Just to clarify. The original tires were goodyear, they came with the motorhome. The only difference is that those tires were 14 ply and the Toyos are 16 ply. Motorhome drove straigt and nerrow with the Goodyear and the only reason I changed tires was because the old tires were 7 years old. The feel of the new ones are that when I turn the wheel it seems like a long delay before the tires grab hold and turn, then I overcorrect its like fishtailing down the road
Other than manufacturer you do not mention the specific design. Tread pattern can have a significant impact on steering response.
See here for more info.
You can learn more if you visit my tire blog RVTireSafety
In my opinion as a QS9000 and ISO/TS 16949 Quality auditor the word "Quality" does not appear to be in the RV industry dictionary.
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randallb
On the road
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Joined: 11/19/2007
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Get your pressures right! Your most recent statement tells me that you are indeed dealing with a tire reaction difference. Either the pressures are so far off that they are driving the RV and then you are trying to make them do what you are used to. Adapt! But I will take them off your hands if they are free.
Randy
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wildmanbaker
Kennewick, Washington
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Joined: 02/24/2005
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We have the same tires on the front end of our Ford powered Flair, 34 foot MH. Les install them with 110 psi, and they rode hard. Have found that 100 psi is just about right for it. It has steered and rode great, and they replaced GYs. Raise the front end in the air and hand spin the tires to verify they are rolling straight and even/ installed correctly. Also, look under the MH in the front to see that nothing is damaged, or bent. Stuff does happen.
Wildman 
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LVJ58
Las Vegas, Nevada
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Joined: 02/26/2001
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We have a 2000 38' coach with the 245/70x19.5 tires and run 80 psi which is more than adequate to safely support the weight of our coach based on it's weight and the tire manufacturer's load inflation chart.
Jim & Sherry Seward
Las Vegas, NV
2000 Residency 3790 V-10 w/tags & Banks System
2003 Suzuki XL/7 toad
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wny_pat
Western NYS
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Joined: 08/11/2007
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Toyo RV tire guide and click on RV Inflation Table
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DFord
Near St Louis, MO
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Joined: 12/16/2001
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Step #1: Have your MH weighed on all four corners. The heaviest tire on an axle determines the pressure required for all tires ON THAT AXLE.
Step #2: Get the Load Chart for your tires and find the pressure required for the weight your tires are supporting.
Step #3: Adjust the pressure to the recommended pressure shown in the Load Chart table.
My 38ft MH only requires the minimum pressure shown in the charts to support the weight they're carrying yet the chassis is near it's maximum gross weight.
Don Ford
2001 MHC Residency 3790 - 2000 Ford F53 Chassis w/Tag Axle
'09 HHR 2LT Towed
ReadyBrake Inertia Brake System - BlueOx Aventa II Towbar & BX1648 Baseplate
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