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02-14-2019, 05:17 PM
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#1
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Junior Member
Brand: Thor Motor Coach
State: North Carolina
Posts: 29
THOR #8948
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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 I’m 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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02-14-2019, 05:52 PM
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#2
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Senior Member
Brand: Thor Motor Coach
Model: THOR Chateua 35SF
State: Florida
Posts: 5,850
THOR #11130
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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.
__________________
Now an SOB
Traded Thor for Melbourne Prestige 24NP
2018 THOR Chateau 35SF
Two Labs, Bugsie & Blondie
Blondie passed in 2020 at 5 to Leukemia
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02-14-2019, 05:53 PM
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#3
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Senior Member
Brand: Thor Motor Coach
Model: 2013 ACE 30.1
State: Alberta
Posts: 1,410
THOR #2631
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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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02-14-2019, 08:34 PM
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#4
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Junior Member
Brand: Thor Motor Coach
State: North Carolina
Posts: 29
THOR #8948
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Thanks!
Thanks to you both! I checked by the drivers seat and it’s 82 psi front and rear. Will correct before the trip.
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02-14-2019, 08:38 PM
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#5
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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Have a great time at WDW!!
__________________
"What: me worry?"
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
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02-14-2019, 09:47 PM
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#6
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Senior Member
Brand: Thor Motor Coach
Model: 2013 31L
State: Florida
Posts: 2,184
THOR #908
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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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02-15-2019, 11:22 AM
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#7
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Junior Member
Brand: Thor Motor Coach
State: North Carolina
Posts: 29
THOR #8948
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Quote:
Originally Posted by Bob Denman
Have a great time at WDW!!
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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 it’s always easy sailing!
Christina
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02-15-2019, 11:25 AM
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#8
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Junior Member
Brand: Thor Motor Coach
State: North Carolina
Posts: 29
THOR #8948
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Quote:
Originally Posted by blw2
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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Hi! Yes we do have the same chassis and Michelin tires. Thanks for the tip!
Christina
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02-15-2019, 06:30 PM
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#9
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Senior Member
Brand: Thor Motor Coach
Model: 2013 ACE 30.1
State: Alberta
Posts: 1,410
THOR #2631
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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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02-15-2019, 07:11 PM
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#10
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Senior Member
Brand: Thor Motor Coach
Model: THOR Chateua 35SF
State: Florida
Posts: 5,850
THOR #11130
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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.
__________________
Now an SOB
Traded Thor for Melbourne Prestige 24NP
2018 THOR Chateau 35SF
Two Labs, Bugsie & Blondie
Blondie passed in 2020 at 5 to Leukemia
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02-15-2019, 07:17 PM
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#11
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I Think We're Lost!
Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 22,195
THOR #8860
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Quote:
Originally Posted by Christina1pac
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 it’s always easy sailing!
Christina
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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! )
__________________
"What: me worry?"
Good Sam Member 843599689
Current coach: Tiffin Wayfarer 24 BW
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02-17-2019, 02:08 AM
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#12
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Senior Member
Brand: Thor Motor Coach
Model: 2016 Siesta Sprinter 24ST
State: Florida
Posts: 604
THOR #2812
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Quote:
Originally Posted by The Gritz Carlton
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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Class warfare, not that knot size matters. My class C is more svelte and not as clunky as the Mayflower mover contingent.
__________________
U.S. Coast Guard retired- 1956-1985
Pensacola, Florida
2016 Siesta 24ST
1972 Moto Guzzi Eldorado
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