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Thread: Tire PSI
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Old 11-13-2020, 02:52 PM   #10
16ACE27
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Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 5,192
THOR #7035
Quote:
Originally Posted by Sdkim View Post
Hello everyone,

I have a 2020 Challenger 37FH. The tire size is 255/80 R22.5 XRV. The rv weighs in at 7,890 lbs front axle, 15,990 lbs rear axle.

I was advised to fill my tires at 110 psi for all six tires.

Does this sound right?

Thanks in advance.
[QUOTE=Sdkim;263872]
Quote:
Originally Posted by Lt Keefer View Post
What does the tire manufacturer

Attachment 27123

I think, according to the chart, 110 psi. But it just seems really high to me.

OK, rough numbers from your axle weights are 4000 lbs per tire.
From your chart:
For singles (front) you can support 4070 lbs per tire at 75 PSI
For duals (rear) you can support 8080 lbs per pair at 85 PSI

The MAXIMUM pressure for the tires is 110 PSI which is entirely too high for your load.
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2016 ACE 27.1
2016 Chevy Sonic Toad
2020 Chevy Colorado Z71 Trail Runner Alternate Toad
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