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Old 03-13-2017, 12:57 AM   #1
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Air Pressure on 215/75R17.5 H Tires

As most Redwoods heaviest wheel position will weigh in the 3,600 lb. plus range, to generate a 20% reserve load capacity you need to air the tire to carry at least 4,320 lbs.

@ 110 psi the load capacity is 4,340 lbs.
@ 115 psi the load capacity is 4,495 lbs.
@ 120 psi the load capacity is 4,650 lbs.
@ 125 psi the load capacity is 4,805 lbs.

I run my tires @115 psi and add at 110 psi.
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Old 03-13-2017, 03:32 AM   #2
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Ron
Best post I have seen all winter
Will be leaving Florida tomorrow morning to head north and the 3rd item on my list is to check the tire pressure before leaving.
THANK-YOU
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Old 03-13-2017, 03:47 AM   #3
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Curbside wait is a lot less then the left side. Should I bury the tire pressure based on the weight
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Old 03-13-2017, 01:53 PM   #4
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Good info for Ron's 2015 38GK and his tires and loads...
but each rv weighs a different amount - even between like model years!
after all, my wife's shoes may be less than your wife's shoes

So spend the 30 minutes and $10 or so to at least use a Cat Scale to get an axle weight to ensure you have enough carrying capacity. And then you can get a per tire weight when you have an opportunity to be a bit more exact...
good luck !
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Old 03-13-2017, 06:40 PM   #5
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Air all tires the same based on your heaviest wheel position.
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Old 03-13-2017, 10:41 PM   #6
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Quote:
Originally Posted by Titan Guy View Post
As most Redwoods heaviest wheel position will weigh in the 3,600 lb. plus range, to generate a 20% reserve load capacity you need to air the tire to carry at least 4,320 lbs.

@ 110 psi the load capacity is 4,340 lbs.
@ 115 psi the load capacity is 4,495 lbs.
@ 120 psi the load capacity is 4,650 lbs.
@ 125 psi the load capacity is 4,805 lbs.

I run my tires @115 psi and add at 110 psi.
Ron, What happens if your run the tires at the 125 psi. My guess the trailer bounces around more.
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Old 03-13-2017, 11:08 PM   #7
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Yes, you would get a rougher ride.
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