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Old 09-25-2016, 09:55 AM   #1
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Tire Psi

Hi....I have a 16' Bambi and have 16" wheels. It says on the tire the psi is 65. What psi should I actually fill the tire to while cold?
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Butch
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Old 09-25-2016, 10:07 AM   #2
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Refer to the manufacture inflation chart. The printed number on the tire side wall is a Max. pressure. The pressure you want is a function to the weight of the trailer as loaded.
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Old 09-25-2016, 09:50 PM   #3
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Or, you can read commentary on this subject from the two tire engineers who post here that the pressure tables don't apply to tires in trailer service. Max pressure per sidewall statement is best for longest and most reliable tire service. Do otherwise at a greater risk of tire failure.
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Old 10-07-2016, 07:30 PM   #4
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Put at 65 psi when cold. Preferably in the morning. It is difficult to keep it at that depending on time of year and day. I would venture to say that all these variable are taken into consideration when the tire is being developed. Just look at the pro drivers. Once a tire is on the pressure is the last they are thinking about. And please don't put LT tires on a travel trailer. They are constructed differently and they flex. Plus the load an LT tire can handle is less than a tire for trailers.
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Old 10-07-2016, 07:37 PM   #5
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I run my ST tires at the max printed on the sidewall.
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Old 10-08-2016, 08:37 AM   #6
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30K miles on ST tires at 55psi. Never had a problem. No rivets shearing or hard ride problem. I limit my speed to 60mph.
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Old 10-19-2016, 12:55 PM   #7
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Tire pressure value indicators

Anyone have any luck with the screw on tire pressure indicators set at 65psi?
Seems like a good idea if you don't have a TPMS on board
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Old 10-19-2016, 07:52 PM   #8
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I run mine between 65 and 68 psi.
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Old 10-24-2016, 09:05 PM   #9
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I can almost bet that the engineers that developed the tires had constructed a product that can handle the gyrations of tp. Just as long as you don't run them like run flat tires. Did you know that the tp of tires facing the sun in the morning is higher that the tp of tires in the shade.
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Old 10-24-2016, 10:03 PM   #10
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Quote:
Originally Posted by Barbieri View Post
I can almost bet that the engineers that developed the tires had constructed a product that can handle the gyrations of tp. Just as long as you don't run them like run flat tires. Did you know that the tp of tires facing the sun in the morning is higher that the tp of tires in the shade.
You might open a Physics book and look up TPV
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Old 10-25-2016, 06:06 AM   #11
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As you have found there is a max cold fill pressure on the side wall of the tire. The vehicle manufacturer (a travel trailer in this case) will also publish a cold fill pressure as well based on the design of the vehicle.

Vehicle manufacturers tend to install a tire that will just accomodate the max load with not much margin. Most passenger vehicles rarely see the max load. Many travel trailer run at or near the max load all the time, so inflating the tires to max pressure (on a cold tire) shown on the tire side wall will handle that load.

Weighing your trailer will help you to understand what load is being applied to the tires. It is useful to know that load on each tire. Or at least from side to side, front to back.

Always fill a cold tire. As a tire is used the pressure will rise because the tire is flexing in use and generates friction which generates heat. And heat causes the presure to increase. And check tires and tire pressure frequently.

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Old 10-25-2016, 06:34 AM   #12
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Quote:
Originally Posted by Barbieri View Post
Put at 65 psi when cold. Preferably in the morning. It is difficult to keep it at that depending on time of year and day. I would venture to say that all these variable are taken into consideration when the tire is being developed. Just look at the pro drivers. Once a tire is on the pressure is the last they are thinking about. And please don't put LT tires on a travel trailer. They are constructed differently and they flex. Plus the load an LT tire can handle is less than a tire for trailers.
Your comments about LT tires are misleading. Your opinion based on misinterpreting facts.
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