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Old 05-15-2014, 02:36 PM   #1
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Changing our 10 yo Mich 275/70 22.5

Wife and I are getting back on the road in a 2004 Dutchstar Spartan/Cummins 370. Model 2025

Need to change out 10 year old 275/70R/22.5

I understand from Spartan that the 275/80R/22.5 XZA3 fits well as it is a taller tire and allows for lower pressure to carry the front axle load. Previously with the 70 series, I had to run 120psi due to the limitation of the Alcoa Aluminum Wheel.

Is this change out ok for my rig and is the XZA3 the right tread? I notice there is XZA2 also.

I remember this forum being the most knowledgeable MH forum back when I was full time.

Thanks,
Dexter
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Old 05-15-2014, 02:47 PM   #2
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I just bought four XZA2 ENERGY 275 70R22.5, thru FMCA Michelin
program for 495 ea, including FET. They are load range "J", which
is higher than my GYs which were 7 years old.
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Old 05-15-2014, 03:11 PM   #3
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I have 6 year old XZA3 on my coach. When it comes time to replace them (there is not even a Hint of Cracking on the sidewalls) I will go with the same tires. They handle and ride nice. I run 100 Psi in the rear and 105 in the front and she rolls like a Cady.
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Old 05-15-2014, 03:27 PM   #4
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I think the 275/80R/22.5 XZA3 is only a load range "G" be sure
it is what you need. The 275/70R/22.5 XZA2 is load range "J"
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Old 05-16-2014, 08:16 AM   #5
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Michelin data Michelin North America RV Load & Inflation Tables will give you the right info you need for the tires you're looking at. Right from the "horses mouth" as it were. Good luck.
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Old 05-16-2014, 09:29 AM   #6
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Hi DexterYard,
I agree with macandphyl and Pigman1. I run the 275X70RX22.5 tires. Base on the coach weight I carry 100 PSI in the front. Carrying 120 PSI might provide a really hard ride. Please get your coach weighed before you purchase tires. The 275s might be good for you.
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Old 05-16-2014, 10:24 AM   #7
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Quote:
Originally Posted by macandphyl View Post
I just bought four XZA2 ENERGY 275 70R22.5, thru FMCA Michelin
program for 495 ea, including FET. They are load range "J", which
is higher than my GYs which were 7 years old.
two weeks ago I had to go with XZE because of the unavailability of XZA2. They had 4 but not 6
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Old 05-16-2014, 06:48 PM   #8
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Quote:
Originally Posted by macandphyl View Post
I just bought four XZA2 ENERGY 275 70R22.5, thru FMCA Michelin
program for 495 ea, including FET. They are load range "J", which
is higher than my GYs which were 7 years old.
Load range J on 120 psi max. (LR H) rims are overkill since you can't use the higher pressure anyway.
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