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Old 02-14-2019, 04:17 PM   #1
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Tire pressure

Hi everyone,

I have a 2016 ACE 29.3, which I mostly use for short trips to the beach. Now Iím prepping for a long drive to Disney World and checked my tire pressure. I saw 90 psi in the front tires and 60 psi in the rear tires. The tires say 110 psi. I am bad about checking tires pressures cannot remember what level they were at the last time I checked. Can anyone help me locate where on the RV I can find the recommended pressure?

Also, is a big difference like that between front and rear tires there for a reason?

Thanks!
Christina
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Old 02-14-2019, 04:52 PM   #2
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Look in the driver or jamb. The proper pressure for your specific vehicle is there, posted by manufacturer. Tire makers do not know what they are going to be mounted on but give recommendations on assumptions and within safety nets. I usually run about 10 pounds below those numbers...makes for a little smoother ride. Check pressure when tires are cold.
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Old 02-14-2019, 04:53 PM   #3
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It is very important to ensure your RV tires are properly inflated, not just to help prolong the tire life, but to also help prolong your life and those of others on the road. My 2013 ACE 30.1 has various labels on the wall near the driver seat, one of which shows the nominal cold PSI values (mine happen to be 82psi front and back). I would say your rear tires are way too low and the fronts are probably slightly high......but I am not familiar with your coach load specifics. I would check for the label and correct tire pressures to nominal ASAP. I would also check your tire manufacturer, size etc and go on line to find the manufacturer details on their tire loads versus tire pressure. Weighing your coach (loaded for a trip) and ensuring the tires are pressurized to properly support the loads is a good practise. Also, using a tire pressure monitor system in your travels is a very good way to help reduce any concerns about day to day tire pressure issues.......the cost is worth it. Safe driving; glad you checked them.
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Old 02-14-2019, 07:34 PM   #4
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Thanks!

Thanks to you both! I checked by the drivers seat and itís 82 psi front and rear. Will correct before the trip.
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Old 02-14-2019, 07:38 PM   #5
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Have a great time at WDW!!
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Old 02-14-2019, 08:47 PM   #6
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keep in mind the numbers in your door are for max load and will result in less than ideal handling and ride.

If you have good weights...corner weights are best to work with, but axle weights will do, then adjust the pressure through the wheel and rim association's (something like that) pressure/load charts for your specific size...available through some tire manufacturers.... Michelin's is readily found online. I've been told that the numbers are standard and will apply to any tire make....for that same size

I think yours is an E-450 chassis like mine, right? Based on my tires and loading, I run 80 psi rear and 70 psi steer. Gives me a much better ride than 80 all around
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Old 02-15-2019, 10:22 AM   #7
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Originally Posted by Bob Denman View Post
Have a great time at WDW!!
Thanks, Bob! Have to admit my hands are already sweating about backing into the camp wilderness site. Those roads are so crooked and small! After that itís always easy sailing!

Christina
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Old 02-15-2019, 10:25 AM   #8
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Originally Posted by blw2 View Post
keep in mind the numbers in your door are for max load and will result in less than ideal handling and ride.

If you have good weights...corner weights are best to work with, but axle weights will do, then adjust the pressure through the wheel and rim association's (something like that) pressure/load charts for your specific size...available through some tire manufacturers.... Michelin's is readily found online. I've been told that the numbers are standard and will apply to any tire make....for that same size

I think yours is an E-450 chassis like mine, right? Based on my tires and loading, I run 80 psi rear and 70 psi steer. Gives me a much better ride than 80 all around

Hi! Yes we do have the same chassis and Michelin tires. Thanks for the tip!

Christina
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Old 02-15-2019, 05:30 PM   #9
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Hi, not a big deal, but just to clarify ......I thought all Thor ACE coaches are Class A built on F53 (or F5D) chassis (position 5, 6, 7 in your VIN) I thought, while the E450 is used more for Class C coaches. I am always willing to learn new things though......
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Old 02-15-2019, 06:11 PM   #10
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If it looks like a shoe box with a flat front...it's an A. If it looks like a Ryder moving van with an "attic" over the cab...it's a C. If it's anything smaller but still a van-style chassis...it's a B. Some bigger B's want to be called a C if they have a small knot on their head. There are a few exceptions but this is the general rule.
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Old 02-15-2019, 06:17 PM   #11
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Quote:
Originally Posted by Christina1pac View Post
Thanks, Bob! Have to admit my hands are already sweating about backing into the camp wilderness site. Those roads are so crooked and small! After that itís always easy sailing!

Christina
Relax: you won't have any problems at all! There's enough park personnel around; that you can always find someone to "spot" for you...
(Please take some pictures for us! )
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Old 02-17-2019, 01:08 AM   #12
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Originally Posted by The Gritz Carlton View Post
Some bigger B's want to be called a C if they have a small knot on their head. There are a few exceptions but this is the general rule.
Class warfare, not that knot size matters. My class C is more svelte and not as clunky as the Mayflower mover contingent.
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