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Old 08-13-2015, 09:43 AM   #1
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Tire Inflation our Mandalay Presidio

Good morning all!

Trying to get this right, don't need any owner introduced road troubles!

Prepped for a big trip, our coach weighed in as follows..

Steer Axle 11,020
Drive Axle 20,640

(this includes our 7x12 enclosed trailer loaded with the bike. Its axle weighed in at 2,835)

We are running Hankook 275/70R 22.5 tires. The Hankook website chart is from 2012. Witch I guess still must be in play.

My wall placard in the coach provided by Thor says 120 psi,,,, in all tires. Which is the max PSI tamped in the sidewall of the Hankooks. We have the coach 3 months now, and we have been following the placard. 120psi in all tires.

The front axle seems easy, the Hankook chart at my weight says 110psi, I think I will stick with 120psi.

The Hankook rear chart, says 80psi. I was thinking I should run 90psi.

Others have suggested I look a the Michelin site, given they own Hankook. Michelin has 4 different tire models my size. The pressures vary, 3 call for 90 to 95 psi, one tire model calls for 105 to 110. Given they do vary by tire model, I'm thinking I should not follow Michelin specs as they are not for my Hankook tires,,, and the model must matter.

What would you do?

L.
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Old 08-13-2015, 12:05 PM   #2
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I'd think 120 psi on the dual axle would be way too much. You could go with the recommended pressure from the Hankook weight/PSI chart + 5 psi and be good. Often the pressures listed by the auto/truck/RV makers are the maximum pressure, not the recommended pressure for the actual axle load.
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Old 08-13-2015, 12:38 PM   #3
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Hi!

So instead of adding 10 psi and making it 120, your thinking add 5 and make it 115? That probably makes sense, I doubt my front weight varies much.

L.
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Old 08-13-2015, 12:41 PM   #4
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Quote:
Originally Posted by Lloyd in S.C. View Post
Hi!

So instead of adding 10 psi and making it 120, your thinking add 5 and make it 115? That probably makes sense, I doubt my front weight varies much.

L.
I don't like running tires at their rated maximum. Hot days can take them well above that and I don't like pushing it. Also the ride gets pretty harsh at maximum pressures.
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