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Old 05-07-2022, 12:00 PM   #21
rohrmann
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Our rig came with the Marathons, and the placard showed the 7,000 lb axle was derated to 6,750 lbs so the tires would be legal. It wasn’t long before I upgraded to the G614’s, but even now those aren’t enough, so the Sailuns are the preferred tire.
 
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Old 05-07-2022, 02:03 PM   #22
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Originally Posted by CalandLinda View Post
That is probably not applicable for almost all OEM RV trailer tires. Tire industry standards also have an 80% rule. It reads something like this; when a tire is found to be 20% below vehicle manufacturer recommended cold inflation pressures. It is considered to be in a "run flat" condition and needs to be removed from the wheel to check for internal damages.

I believe this would apply if your carrying a fix weight and running 20% less than recommended pressure for that weight another words you have low air pressure in your tire for a given weight carried. Most tire manufactures have a weight/inflation guide to keep you safe in your travels.
Like my wife`s car it says tires run at 30lbs at the max the car can carry (this would be factory sticker) but the tire says max lbs of 44 which is 32% of tire inflation maximum. This dose not mean it`s running under inflated with the weight it can carry.
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Old 05-07-2022, 09:56 PM   #23
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Originally Posted by bshgto View Post
I believe this would apply if your carrying a fix weight and running 20% less than recommended pressure for that weight another words you have low air pressure in your tire for a given weight carried. Most tire manufactures have a weight/inflation guide to keep you safe in your travels.
Like my wife`s car it says tires run at 30lbs at the max the car can carry (this would be factory sticker) but the tire says max lbs of 44 which is 32% of tire inflation maximum. This dose not mean it`s running under inflated with the weight it can carry.
Okay, I'm just a tire poster. Maybe you will get more Creedence from the USTMA.

https://www.ustires.org/sites/defaul...229634a748a166
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Old 08-29-2022, 07:24 PM   #24
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That’s what the “E” rating is for, Empty Weight Load.
That is just my thought, but it stands to reason why they chose that rating.
Your rug is Empty when you buy it!!!
I went to G rated tires, and found to late, my axles were out of alignment. Needless to say, the tires were short lived. Got the alignment and new tires and was pleased.
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Old 08-30-2022, 04:40 AM   #25
CalandLinda
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That’s what the “E” rating is for, Empty Weight Load.
That is just my thought, but it stands to reason why they chose that rating.
Your rug is Empty when you buy it!!!
I went to G rated tires, and found to late, my axles were out of alignment. Needless to say, the tires were short lived. Got the alignment and new tires and was pleased.
All RV trailer tires are fitted to support the weight of the vehicle's certified GAWRs.
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Old 07-31-2023, 08:39 PM   #26
timrands
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Tires

How many years are tires good for? 2018 Keystone Montana High Country 380th. The only number I see that represents at date is 2117
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Old 07-31-2023, 09:31 PM   #27
Carl n Susan
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A tire Date Code of 2117 means they were made the 21st week of 2017. They are then over 6 years old and due to be replaced.
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Old 08-01-2023, 08:16 AM   #28
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A tire Date Code of 2117 means they were made the 21st week of 2017. They are then over 6 years old and due to be replaced.
Thank for helping me out.
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Old 08-03-2023, 02:05 PM   #29
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Here is what the load range letters mean

Load Range Ply Rating Max Load Carrying Air Pressure

C1 6 @ 50 PSI
C2 6 @ 35 PSI
D1 8 @ 65 PSI
D2 8 @ 50 PSI
E1 10 @ 80 PSI
E2 10 @ 65 PSI
F1 12 @ 95 PSI
G 14 @ 110 PSI

E is 10 ply tire max inflation is 80 psi max load is around 3200-3500 pounds per tire depending on manufacturer.

g is 12 ply tire max inflation 110 psi max load is around 3800 to 4400 pounds depending on manufacturer.
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Old 08-03-2023, 02:14 PM   #30
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Originally Posted by ep4me View Post
Here is what the load range letters mean

Load Range Ply Rating Max Load Carrying Air Pressure

C1 6 @ 50 PSI
C2 6 @ 35 PSI
D1 8 @ 65 PSI
D2 8 @ 50 PSI
E1 10 @ 80 PSI
E2 10 @ 65 PSI
F1 12 @ 95 PSI
G 14 @ 110 PSI

E is 10 ply tire max inflation is 80 psi max load is around 3200-3500 pounds per tire depending on manufacturer.

g is 12 ply tire max inflation 110 psi max load is around 3800 to 4400 pounds depending on manufacturer.
Thank you for info and help.
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Old 08-03-2023, 02:34 PM   #31
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Torque

2018 high country 380th. Should lug nuts be at a certain torque? Thank you
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Old 08-03-2023, 03:28 PM   #32
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2018 high country 380th. Should lug nuts be at a certain torque? Thank you
According to the Keystone owners manual

PRE-TRIP MAINTENANCE ALWAYS REMEMBER- Check lug nut torque before every trip. Keystone RV recommends this maintenance procedure to ensure proper torque has been applied to lug nuts before heading out on the road.- Lug nuts should be torqued to 110-120 ft./lbs. (140-150 ft./lbs. on hubs using a 9/16” stud).- Always follow the appropriate star pattern (See pg. 24) as indicated in these instructions or in your axle manufacturer’s owner’s manual to assure proper torque.- Torque lug nuts in the correct stages and follow-up intervals after any wheel reinstallation. PRE-TRIP PROCEDURE 1 | Set your torque wrench to 110-120 ft./lbs. (140-150 ft./lbs. for 9/16” stud). 2 | Refer to the Wheel Nut Torque Sequence patterns on the next page. Position wheel as illustrated then, starting with the bolt labeled #1, apply torque to all lug nuts following the star pattern that match’s your RV’s wheels. 3 | Complete the procedure on each wheel. Before moving to each new wheel, be sure to verify your preset torque wrench value.

Heres a link
https://www.keystonerv.com/owners-manuals
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Old 08-19-2023, 08:24 AM   #33
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Before you make a tire decision go weight your camper loaded to go camping. Then decide what tire rating you need. If you upgrade to a heavier ply tire look at a spring isolator like cree 3000 to help isolate the heavier ply tire shock. Once you decide run the tires at the max cold pressure on the sidewall. This will keep them cooler running down the road.
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Old 08-19-2023, 01:04 PM   #34
jsb5717
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Originally Posted by timrands View Post
2018 high country 380th. Should lug nuts be at a certain torque? Thank you
Yes...120 lbs as stated. Remember, though, that if you remove your wheels then there is a step up torque procedure you'll need to follow.

First torque is 60 lbs for all lugs, then 90 lbs, then 120 lbs. They also recommend that you pull over at about 25 and 50 miles of your first trip out to re-torque at 120 lbs to make sure all are well seated.

I've had my wheels off several times and have always followed this procedure. There are always a few lugs that benefit from a re-torque. I've found that after a couple re-torques that the lugs stay put. I still check them but they haven't loosened after being well seated.
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