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07-16-2022, 11:04 PM
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#1
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Senior Member
Join Date: Jan 2019
Posts: 398
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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 I’m 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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07-16-2022, 11:14 PM
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#2
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 27,891
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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 ?
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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07-16-2022, 11:17 PM
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#3
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Senior Member
Join Date: Jan 2019
Posts: 398
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Quote:
Originally Posted by Skip426
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 ? |
I’ll check tomorrow and get back with ya. I agree with the low tire ware.
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07-17-2022, 08:29 AM
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#4
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Senior Member
Fleetwood Owners Club American Coach Owners Club
Join Date: Mar 2011
Posts: 6,467
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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.
__________________
2014 American Eagle 45T
DD 13, 500 HP
Pulling a Honda CRV
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07-17-2022, 08:37 AM
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#5
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Senior Member
Join Date: Oct 2014
Posts: 6,315
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Quote:
Originally Posted by Dennis123
I have Michelin 265-75-22.5 tires...
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Might check tire size again. Michelin DOES make a 255/80R22.5.
Many other brands DO make 265/75R22.5.
__________________
Brett Wolfe
Ex: 2003 Alpine 38FDDS. Ex: 1997 Safari Sahara. Ex: 1993 Foretravel U240
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07-17-2022, 09:41 AM
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#6
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 27,593
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What front tire pressure is specified on the Federal Tire Placard?
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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07-17-2022, 03:30 PM
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#7
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Senior Member
Join Date: Jan 2019
Posts: 398
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Quote:
Originally Posted by Dennis123
I’ll check tomorrow and get back with ya. I agree with the low tire ware.
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I gave you the wrong info. Tires are 235-80-22.5. The tires say 110 psi cold. That could be my problem. Been Ronnys’s my 100 psi. Your thoughts.
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07-17-2022, 05:38 PM
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#8
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Senior Member
National RV Owners Club
Join Date: Sep 2018
Posts: 146
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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 .
__________________
Ray & Melinda
2005 National Dolphin 5355 (MEPAW) , Koni FDS shocks, Safe-T-Plus , Front & Rear track bar , Sumo springs . She tows a 2006 Tacoma 4X4
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07-17-2022, 05:43 PM
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#9
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Senior Member
Join Date: Apr 2015
Location: Rogers, AR
Posts: 2,066
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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.
__________________
2019 Fleetwood Discovery LXE 40M w/2021 Equinox
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07-17-2022, 08:22 PM
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#10
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Senior Member
Join Date: Jan 2019
Posts: 398
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Quote:
Originally Posted by alank
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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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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07-17-2022, 08:37 PM
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#11
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Senior Member
Join Date: Aug 2001
Location: North America somewhere
Posts: 27,593
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Quote:
Originally Posted by Dennis123
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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I repeat, What front tire pressure is specified on the Federal Tire Placard?
__________________
2000 Winnebago Ultimate Freedom USQ40JD , ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA. " My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
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07-17-2022, 08:55 PM
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#12
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Moderator Emeritus
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 25,719
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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.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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