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Old 01-17-2025, 09:53 PM   #1
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Tires

I have a 2019 Entegra 31L. Original tires that look near perfect. Tires kept covered and in the shade. At what point would you replace the tires just because of age and no visible wear or sun damage? Thx
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Old 01-17-2025, 11:19 PM   #2
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If they have truly been covered and in the shade most of their lives (less UV from the sun) and they are inspected regularly, I guess I might go 6-7 years. The more family you have driving with you, and the more you care about that family, the sooner you should replace the tires after they get to 5 years from the DOT date that is on the side of each tire.



If those are 225 75/16s...I'm guessing they are E-Load (115) rated from when you bought it new. When you do replace them, I would instead use Commercial load (121) rated instead as the E-Load rated tires are almost at full capacity at full inflation without much load carrying buffer to spare. Commercial load rated 121s give you 500lbs more per tire meaning they have to work less to carry your load and are at a lower risk of a blowout.


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Old 01-18-2025, 09:17 AM   #3
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SJ-Chris in SPOT ON!

Model 31L measures 32.5 feet long with a pair of heavy slide-outs. Heed his advice on tire selection, 121C tires.

If I owned that rig, I would replace those tires with 121Cs, the day after I bought that rig.
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Old 01-18-2025, 10:45 AM   #4
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SJ-Chris in SPOT ON!

Model 31L measures 32.5 feet long with a pair of heavy slide-outs. Heed his advice on tire selection, 121C tires.

If I owned that rig, I would replace those tires with 121Cs, the day after I bought that rig.
These kind of comments bewilder me. The OPs rig is a 2019 with the original tires on it. They performed well for about 7 years. Why would you have replaced them when you bought it, brand new ?

Upgrading now makes sense if it doesn't create a harsher ride, but not right off the dealer lot.
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Old 01-18-2025, 11:26 AM   #5
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These kind of comments bewilder me. The OPs rig is a 2019 with the original tires on it. They performed well for about 7 years. Why would you have replaced them when you bought it, brand new ?

Upgrading now makes sense if it doesn't create a harsher ride, but not right off the dealer lot.
Two points.....

Assurance for the peace of mind.
and
Insurance to make sure a tire blow-out never happens.

Since his rig is made as big and heavy as they come, he is rolling the dice in a big way. One rear tire blow-out will do more irreparable damage than the cost of two sets of tires. When a rear tire blows, it often immediately shreds, slapping huge masses of tire rubber around, grinding up everything around it including the floor of the house. Repairing such damage is "Bandaid" at best. I wouldn't risk it. Just buy a new set of 121C tires and be done.... very cheap insurance (and assurance).
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Old 01-18-2025, 11:27 AM   #6
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What is a 31L? Class A or C? What size tires and wheels? 31 footer with 16.5" wheels would be suspect.
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Old 01-18-2025, 12:03 PM   #7
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I have no problem going ten years. That includes a spin inspection that would identify out of round, and continuous attention to the ride for changes in sound or feel. There are way too many less than five year old tires that blow out to ever say there is peace of mind driving a box of sticks down the highway.


You don't say where it's kept, heat is the biggest factor in aging. If you're picking an age, five or six years seems to be where the risk starts going up. Six years was a German study I believe.
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Old 01-18-2025, 01:40 PM   #8
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Previous 23’ class A motorhome loaded weighed around 9500# loaded and fueled. Current 30’ class C motorhome weighs just under 13000# loaded and fueled. Both spec’ed the same size tires (225/75/16)and load rating. I had no problem going 7 years on the 23 footer with quality tires on the rear. I did change the fronts at 50K and 4 years in.

Our current 2019 Forest River only had 12k miles on it when we bought it just over a year ago. I immediately changed the tires, not so much about age. Just that they were too close to the load max for my comfort especially the fronts. I went up a tire size (235/80/16) for the higher load rating, comfort and ground clearance.

If I were trying to stretch my mileage I would replace fronts first since a tire failure there will put you in the ditch quicker.
A rear failure likely won’t get you killed, but it could tear up a lot of expensive stuff that might be located just above the wheel well.
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Old 01-18-2025, 07:45 PM   #9
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Previous 23’ class A motorhome loaded weighed around 9500# loaded and fueled. Current 30’ class C motorhome weighs just under 13000# loaded and fueled. Both spec’ed the same size tires (225/75/16)and load rating. I had no problem going 7 years on the 23 footer with quality tires on the rear. I did change the fronts at 50K and 4 years in.

Our current 2019 Forest River only had 12k miles on it when we bought it just over a year ago. I immediately changed the tires, not so much about age. Just that they were too close to the load max for my comfort especially the fronts. I went up a tire size (235/80/16) for the higher load rating, comfort and ground clearance.

If I were trying to stretch my mileage I would replace fronts first since a tire failure there will put you in the ditch quicker.
A rear failure likely won’t get you killed, but it could tear up a lot of expensive stuff that might be located just above the wheel well.
Well stated, well done.

Our 2007 rig is 23'-8" long. It's weight requires a mere 63 PSI in the rear tires and less in the fronts. Because of the weight (lack of) along with indoor climate controlled storage, I kept the original Michelin tires for 14 years and 38,000 miles. I occasionally inspected the rubber to be in good condition with no side-wall cracking or any other indication of tire-breakdown. After 14 years, though the tires remained in near perfect condition, I replaced them because I was no longer psychologically comfortable going longer. My replacement tires are Michelin.

My situation is not the norm. I cannot recommend other people to keep their tires in service for 14 years. I only share my personal history.
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Old 01-18-2025, 09:38 PM   #10
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Two points.....

Assurance for the peace of mind.
and
Insurance to make sure a tire blow-out never happens.

Since his rig is made as big and heavy as they come, he is rolling the dice in a big way. One rear tire blow-out will do more irreparable damage than the cost of two sets of tires. When a rear tire blows, it often immediately shreds, slapping huge masses of tire rubber around, grinding up everything around it including the floor of the house. Repairing such damage is "Bandaid" at best. I wouldn't risk it. Just buy a new set of 121C tires and be done.... very cheap insurance (and assurance).
So upgrading tires insures that you will never get a blow out.
Now that's a fantasy !
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Old 01-19-2025, 09:00 AM   #11
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So upgrading tires insures that you will never get a blow out.
Now that's a fantasy !
Okay, you got me there. I should have stated " Greatly Reduces" the the risk of a tire blowout when conditions are very close to, are at, or beyond load limit.

My general rule of thumb is, if the front or rear tires requires 75 to 80 psi because of the load, consider 121C tires for that axle. Under those circumstances, changing to 121Cs will greatly reduce the chance of a tire blowout.

Your earlier point of "over-kill" is well noted. But even under lesser-load conditions, there is a benefit to 121C tires in the rear. If one tire develops a slow leak, the adjacent tire has a much better chance of surviving until you notice the problem. But like you say, the ride suffers, hence, my smaller/lighter rig has standard "E" tires.
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