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Old 05-25-2022, 06:35 PM   #1
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Brand: Thor Motor Coach
Model: Thor Magnitude XG32 4x4,
State: Utah
Posts: 178
THOR #19682
Replacement Tires on XG32 Question

Has anyone ever replaced the tires for a higher load rating? I now have 23K miles on my XG32 and 3 of the tires are spiking (dealer term for the middle tread wearing out first) but there is a lot of tread life on them. The tire pressure is good and has been maintained.

The dealer felt that the coach is too heavy for the existing G rated tire. He suggested that I go up one or two load ratings and replace the tires.

Has anyone had the same issue? We live in the hot desert and you can't have any tire issues when its 110 and the asphalt is probably 175.

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Old 05-25-2022, 06:38 PM   #2
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Brand: Thor Motor Coach
Model: 2018 24.1 AXISSIXxSIX
State: Arizona
Posts: 5,182
THOR #13932
Look up the cause of how your tires are wearing then decide if your tire guy is right.
I'm not sure he his.
I know very well of the same issue but it wasn't related to weight.

If you trust him, he will suggest the best trailer tires he can warrant.
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Old 05-25-2022, 07:26 PM   #3
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Brand: Thor Motor Coach
Model: Thor Magnitude XG32 4x4,
State: Utah
Posts: 178
THOR #19682
Quote:
Originally Posted by ducksface View Post
Look up the cause of how your tires are wearing then decide if your tire guy is right.
I'm not sure he his.
I know very well of the same issue but it wasn't related to weight.

If you trust him, he will suggest the best trailer tires he can warrant.
The dealer is an aligment center that only does medium duty, big rigs, busses and motorhomes. and above. He doesn't sell tires. One of the smartest guys on alignment, load, suspension, and such I've ever met. Crazy busy and booked out about a month. When I had my rig in there he was aligning 4x6 BLM Wild Fire Trucks.

He thought I could drive these tires safely for another year possibly more. I am going to drive these for at least another year.
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Old 05-25-2022, 07:59 PM   #4
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Brand: Thor Motor Coach
Model: Tuscany 42GX
State: Missouri
Posts: 606
THOR #9178
Your tires are 19.5", correct?

What psig are you maintaining? Steer and drive?

Which was the 3rd tire with center wear?

In the past i ran many vehicles with 19.5's and never wore a tire center

Most were at 115 psig
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Old 05-25-2022, 08:05 PM   #5
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Brand: Thor Motor Coach
Model: 2018 24.1 AXISSIXxSIX
State: Arizona
Posts: 5,182
THOR #13932
A far too narrow rim can cause this but 19.5 is pretty well standardized so I doubt a 31x10.5 on a 4inch rim relates.
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Old 05-25-2022, 08:16 PM   #6
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Brand: Thor Motor Coach
Model: 2020 Magnitude SV34
State: Florida
Posts: 3,137
THOR #12751
Replacement Tires on XG32 Question

You canít just use the pressue on the door sticker.

You need to weigh your coach and use the Continental document that specifies the tire pressue based on front and rear weight.

I have an SV34 with the same tires and is heavier than your XG32. Using Continentalís recommended pressure for my front and rear weight, Iím running 85 - 90 for the front and 95 - 100 for the rears.

I have no wear issues at 20,000 miles.
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