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Old 06-27-2015, 12:44 PM   #15
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Whatever coach you have and no matter how much stuff you load it with, the steer tires should always have more psi than the rears. Half as many tires = more load/tire.
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Old 06-28-2015, 12:05 PM   #16
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Originally Posted by Hurk View Post
I installed my Hawkshead TMPS and am very happen with it. My cold ambient air pressure front is 100 psi and 95 rear. After driving 20 minutes starting ambient temp is 68and tire temp increases to 85 and the tire psi front to 115 and reared to 110. All tires increase consistent amount. So 17 degrees increase shud be approx 8 psi increase but mine is double that? My buddy purchased the same TMPS and is tire pressure increase are consistent with mine. I'm not concerned as my increases are consistent for each tire. But are you saying that I have excessive moisture in my tires?

Not 100% sure about the moisture but that is all I come up with right now. Am in contact with other technical sources and will post info next week.
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Old 06-28-2015, 12:43 PM   #17
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Originally Posted by bamaboy473 View Post
Whatever coach you have and no matter how much stuff you load it with, the steer tires should always have more psi than the rears. Half as many tires = more load/tire.
I disagree with this blanket statement. I had my coach weighed and the front axle load is less than half of the rear axle load, therefore the front tires have less load than each of the rear tires,
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Old 06-28-2015, 12:47 PM   #18
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mine is the same coach with op. according to the coach tech spec, my tires (12r22.5) call for 120psi front, and 110psi rear. i understood that should be cold baseline. i set my tpms with that numbers, and happy.

the primary cause of tire failure is under inflation.
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Old 06-28-2015, 02:04 PM   #19
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Whatever coach you have and no matter how much stuff you load it with, the steer tires should always have more psi than the rears. Half as many tires = more load/tire.

Sorry but whoever told you that is simply wrong.
Proper inflation is simply not based on the number of tires you have on an axle end.

It is also fact that two tires are not rated to carry twice the load of a single tire. Therefore the reason for Single vs Dual load capacity. I suggest you read the sidewall of your tires.

Proper inflation is based on science and not old wives tales.

Get your RV on a scale and let us know the load on each position and there are a few of us here than can provide a fact based reply on the minimum inflation you should run.
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