nadsab
Michigan
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Joined: 06/28/2004
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Hi,
Our Four Winds 5000 has LT225 75R16 tires I was wondering what you folks would reccomend as PSI for inflation?
The tires don't say on them what to inflate to, but there is something on them about maximum load 65 PSI. That seemed kind of high to me since the tires are 9 years old was wondering if I should inflate them that high.
Four Winds Five Thousand, 23'
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dan-nickie
Grand Prairie, TX
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If they are 9 years old, you should probably think about replacing them.
Dan and Nickie, Four Winds 31p, Retired Jan/2011
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mikeleblanc413
Sour Lake, Texas
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You can find a tire inflation chart at Michelin...someone else on here may have the link...
Mike LeBlanc, "The Digital Guy"
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Sour Lake, Texas
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Sfla2
fort lauderdale, fl
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should be a door sticker on drivers post most c use 80 rear dual, 65 frt
98 Coachmen "C" Santara Model FL (Front Lounge) 304
Ford v 10
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nadsab
Michigan
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Sfla2 wrote:should be a door sticker on drivers post most c use 80 rear dual, 65 frt
80 PSI? Wow that seems high to me, I always kept then at 65 front and rear - only because of what I read on the sidewalls. Can the uniroyals handle that much pressure?
If I kept them at 65 would that cause cracking on the sidewalls? I remember reading somewhere if they don't have enough pressure and dont drive often that this can cause some cracking of the sidewalls.
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nadsab
Michigan
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nadsab wrote:Sfla2 wrote:should be a door sticker on drivers post most c use 80 rear dual, 65 frt
80 PSI? Wow that seems high to me, I always kept then at 65 front and rear - only because of what I read on the sidewalls. Can the uniroyals handle that much pressure?
If I kept them at 65 would that cause cracking on the sidewalls? I remember reading somewhere if they don't have enough pressure and dont drive often that this can cause some cracking of the sidewalls.
...just checked the four winds manufacturers tag on post - it says 65 psi front and rear.
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tatest
Oklahoma Green Country
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80 psi is the maximum load inflation pressure for load range E, and would be the maximum load inflation pressure for rear tires only on a 1 1/2 ton chassis (i.e. Ford E-450) loaded to 14,000 pounds.
If the tires are load range D and the chassis is a one-ton (Ford E-350 or General Motors 3500) the inflation pressure for maximum allowable load will be 65 psi. If you don't know the actual load, 65 psi is the best guess. That's probably what is on the door post.
Minor generalized cracking of sidewall rubber is usually from UV and ozone damage, but heat can also contribute. Heat comes from running under-inflated or overloaded, two sides of the same coin.
Deep localized cracking can be from physical damage (bouncing off curbs, running over rocks, hitting potholes at too high a speed). Nine year old tires could have a lot of physical damage.
I replaced six OEM tires at 30,000 miles (less than half worn) and seven years of age because the cracking on one of the tires included a spot that looked like physical damage. More nervous people might replace tires at the first sign of weather checking; less nervous people might leave the tires until they blow out, or will no longer hold pressure in storage.
Tom Test
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2001 Ranger Edge
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crawford
Dandridge Tenn.
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Not really if you run max air pressure it allows for max weight you haul. But remember weighting the coach is best way to know for sure.
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tenbear
Northern Vermont, USA
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As tatest said, load range D tires are limited to 65 psi. My Four Winds 28A came with load range D tires and the recommended pressure was 65 rear and 60 front. I have since replaced them with load range E tires and now inflate them to 70 rear and 65 front. They ride a little harder and run a little cooler.
Class C, 2004/5 Four Winds Dutchman Express 28A, Chevy chassis
2010 Subaru Impreza Sedan
Camped in 45 states, 7 Provinces and 1 Territory
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