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Old 07-16-2022, 11:04 PM   #1
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Tire Wear

I have Michelin 265-75-22.5 tires on my 2019 Tiffin Allegro. Tires have 21k on them. Back tires look great, wearing great. The front tires are wearing on the inside and outside on both fronts. I keep 100 psi in them. The way Iím thinking they need more air ????? Your thoughts and how many miles should I expect out of my tires on a average ?
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Old 07-16-2022, 11:14 PM   #2
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Equal wear inside and out on the tread is usually an indication of low pressure for the weight .

A picture of the wear would be very helpful .

Have you had the coach weighed , loaded for travel ?
Do you have a tire manufacturer's inflation chart ?
What is the max inflation listed on the tire sidewall ?
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Old 07-16-2022, 11:17 PM   #3
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Equal wear inside and out on the tread is usually an indication of low pressure for the weight .



A picture of the wear would be very helpful .



Have you had the coach weighed , loaded for travel ?

Do you have a tire manufacturer's inflation chart ?

What is the max inflation listed on the tire sidewall ?


Iíll check tomorrow and get back with ya. I agree with the low tire ware.
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Old 07-17-2022, 08:29 AM   #4
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Right now you are guessing....as noted above, weigh the coach and compare the weight on the front axle with the charts from Michelin.
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Old 07-17-2022, 08:37 AM   #5
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I have Michelin 265-75-22.5 tires...



Might check tire size again. Michelin DOES make a 255/80R22.5.


Many other brands DO make 265/75R22.5.
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Old 07-17-2022, 09:41 AM   #6
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What front tire pressure is specified on the Federal Tire Placard?
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Old 07-17-2022, 03:30 PM   #7
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Iíll check tomorrow and get back with ya. I agree with the low tire ware.
I gave you the wrong info. Tires are 235-80-22.5. The tires say 110 psi cold. That could be my problem. Been Ronnysís my 100 psi. Your thoughts.
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Old 07-17-2022, 05:38 PM   #8
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Weigh the coach! The cold pressure on the side wall is Max. pressure not the recommended pressure . The only way to get the correct pressure is to weigh the coach and set the pressure called for that weight by the tire manufacture . Plus up to 10% over for safety margin .You can go online to the Michelin tire site to get a chart with proper inflation pressure .
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Old 07-17-2022, 05:43 PM   #9
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My first question would be: Do you have the correct size tire on the coach that the driver wall placard calls for? Why did you think you had a 265-75-22.5 tire on the coach, is that what's on the placard and you actually have 235-80-22.5 on the coach?
At any rate, tire wear on the outside means there isn't enough air in the tire to get equal weight across the tread surface. It could also mean your 235 tire is on a rim that is too wide, which will put more pressure on the outsides of the tread area, and that may be hard to offset with additional pressure and stay within the limits.
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Old 07-17-2022, 08:22 PM   #10
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My first question would be: Do you have the correct size tire on the coach that the driver wall placard calls for? Why did you think you had a 265-75-22.5 tire on the coach, is that what's on the placard and you actually have 235-80-22.5 on the coach?

At any rate, tire wear on the outside means there isn't enough air in the tire to get equal weight across the tread surface. It could also mean your 235 tire is on a rim that is too wide, which will put more pressure on the outsides of the tread area, and that may be hard to offset with additional pressure and stay within the limits.


I have big trucks and that is where I was wrong with the size. It is a factory tire from Tiffin. On it new to n 2019
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Old 07-17-2022, 08:37 PM   #11
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I have big trucks and that is where I was wrong with the size. It is a factory tire from Tiffin. On it new to n 2019

I repeat, What front tire pressure is specified on the Federal Tire Placard?
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Old 07-17-2022, 08:55 PM   #12
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Until you get it weighed, use the Tiffin-recommended psi shown on the federal tire placard. Anything less is unsafe. That's why Ray keeps asking you about it.
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