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Old 10-05-2014, 04:53 AM   #1
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Adventurer Tire Pressure

What is the best pressure to run tires at on my Winnebago Adventurer? I could not find any info in the manual or any paperwork that came with unit. It appears that the rear four are running at about 90 and the fronts at 95.

Any help appreciated.
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Old 10-05-2014, 04:55 AM   #2
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Adventurer Tire Pressure

You need to have your mh weighed to determine that. Preferably each corner but each axle will suffice until then.
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Old 10-05-2014, 05:50 AM   #3
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I agree that you need to weigh your rig and look at an inflation table. We can't answer your question without knowing the size of your rig and its weight. My 38' Suncruiser is set at 105# front and 100# rear based upon being loaded to near the GVW.
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Old 10-05-2014, 08:56 AM   #4
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My tire pressure information is on the driver side door which says at maximum weight GVW. I need 80psi. My tires are 245/75-19.5 Goodyears.
The psi stamped on the side of the tire say maximum pressure is 95 psi.
The placard on my door is imformation for my particular coach, the pressure on the tire is based on the tire build strength.
You should always use the placard information in your particular vehicle.
Maxinum pressure is always the safest but not the most comfortable ride, you need to weigh your coach and adjust pressures to the weight you are carrying.
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Old 10-05-2014, 12:53 PM   #5
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I would go to the manufacturer of your tires to get the specific inflation table for your tires. Next use the weights listed on your door sticker. I did this with mine and found my tires were grossly over inflated once I weighed each corner fully loaded.

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Old 10-06-2014, 01:57 AM   #6
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What size? 95 in my 19.5 for max weight.
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Old 10-06-2014, 02:15 AM   #7
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I can calculate it with spreadsheet I made, in wich I use an even saver formula then the tire-makers do, and takes care of the same deflection of tire for every pressure/load combination. Also takes standard a reserve for things like pressure loss in time , misreadings of weight and pressure scales, unequall loading R/L etc, but still acceptable comfort and gripp.

for that I need from Motorhome?! GAWR (Gross Axle Weigt RAting) front and back, GVWR ( V = Vehicle), number of axles front and back and number of tires on the axles. Best would be 4 point weighing , second best axle weighing.

From tire I need maximum load and pressure needed for that ( 95psi= F-load/12ply and 80 psi= E-load/10ply) read from sidewall.
The speedcode can be handy too ( N is up to 140km/86m/h , Q=160km/99m/h).

Give all that and I will give a picture of my filled in calculator in my answer.

Greatings from Holland from a pigheaded self declared tire-pressure specialist.
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Old 10-06-2014, 04:36 AM   #8
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I put a set of 4 new Cooper Roadmaster truck tires on about a year ago and run 105# front and 100# rear.
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Old 10-06-2014, 06:31 AM   #9
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I really appreciate all the feedback I have received. I found data on the door which I never open and along with the data stamped on the tire I think I will go with 100 front and 95 rear.

Again thanks all for the quick responses and great information.

Gary
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Old 10-08-2014, 05:50 AM   #10
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Your very welcome,
winne32,

Those pressures sound kinda high as your coach is the sister coach to mine.
How is your ride?
How do your shocks hold up to the bouncing?
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Old 10-08-2014, 11:03 AM   #11
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Quote:
Originally Posted by bobpie View Post
Your very welcome,
winne32,

Those pressures sound kinda high as your coach is the sister coach to mine.
How is your ride?
How do your shocks hold up to the bouncing?
These are truck tires, not the "softer" MH tires and it was recommended to use the slightly higher pressures.
Yes, when I hit a hole in the road, it does feel "hard".

As for my shocks, I replaced both rear sway bar bushings with the newer polyu ones. The fronts were like new.
I have NO bouncing at all when I travel to Fla. from Pa. each year.
Also, I drive between 58 - 62 mph pretty constantly. As a result, many large trucks blow by me and all I feel is a very slight 'push' from the compression. NO white knuckles here.
I am very pleased with the way my unit handles compared to many of the stories I hear from my fellow campers.
I am a Blessed man.
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Old 10-08-2014, 06:20 PM   #12
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Quote:
Originally Posted by winnie32v View Post
These are truck tires, not the "softer" MH tires and it was recommended to use the slightly higher pressures.
Yes, when I hit a hole in the road, it does feel "hard".

As for my shocks, I replaced both rear sway bar bushings with the newer polyu ones. The fronts were like new.
I have NO bouncing at all when I travel to Fla. from Pa. each year.
Also, I drive between 58 - 62 mph pretty constantly. As a result, many large trucks blow by me and all I feel is a very slight 'push' from the compression. NO white knuckles here.
I am very pleased with the way my unit handles compared to many of the stories I hear from my fellow campers.
I am a Blessed man.
Same here, new poly rear bushing, fronts are good. Koni shocks all around.
That's what stopped my "push" from all the trucks.

I still will buy my Good Year G670 RV tires.
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Old 10-08-2014, 10:26 PM   #13
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I have the 16 ply Firestone truck tires on mine and have them inflated according to the load chart which is around 100 psi. Usually they mix the tires on a 35U putting 14 ply (G) on the front and 12 ply (F) on the back duals then using a 14 ply (G) for the spare. With the harsh Florida temps I chose the 16 ply truck tires to better deal with the heat here in the blow-out capital of the USA. The G670 tires I had on before the Firestones made quite a dramatic sound when they blew on a hot day even though the were checked out in good looking condition and inflated per the load chart 15 minutes before the event.
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Old 10-10-2014, 08:24 AM   #14
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Answer to last post of NeilV

then probably the tires that blew where already damaged by the to low pressure for the load you had before filling up.

If you use the Vehicle advice pressure for the OEM tires 12pl and 14 pl for a 16 pl tire you have to low pressure. A stiffer tire , wich the 16 PL/H-load is needs higher pressure for the same load.

American lists give in one list loadcapacity's for all the loadkinds of that sise tire, and that is a wrong way of doing , I dare to state.
European lists are made for every load-kind or Plyrating a new list, wich is the right way of doing.

I made extra save pressure/load-capacity lists and put them in next map, for wich you have to open the USA map.
All PDF's so can be opened in the browser, and pick the one for your loadkind so pressure needed for the maximum load.
https://onedrive.live.com/?cid=A526E...E092E6DC%21904
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Old 10-10-2014, 06:11 PM   #15
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Gogill - sounds like you got the tire pressure issue squared away. If you have a fairly new 37F your just starting a new adventure. Found out two of our camping club members are still down one has a 2013 and the other a 2014 37F and they can't go to our monthly campout - full length slide; king bed ; and hydralic issues on both.
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Old 10-11-2014, 09:01 AM   #16
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TIRE PRESSURE!!!!!!!!!

All joking aside, this is one of the most critically over looked and misunderstood areas of RVing. Michelin has a good review of this topic on its web site.

The bottom line is: weigh your coach and balance your load as close as possible. Use the tire recommended pressure for your load. Use the same pressure for each tire on the axle. It is ok for the front axle to have one pressure and the rear another. Try to check the tire pressure only when the tires are shaded from the sun and at ambient temperature. Check them before every trip.

On a side note, this article from this morning is one some of us might be interested in following: Regulators Investigate Reported Michelin Tire Failures

A couple of years ago, on my last coach, I had a front right tire blow. The coach handled fine getting off the bridge and to a safe stop. But the side of the coach was a mess. It was a Michelin tire that was about 7 years old. On the Michelin site they indicate that their tires can go 10 years "IF" properly maintained. That is the question when you buy a used coach.

Another interesting fact of the tire industry: If a tire is run at 20% under inflation it is considered FLAT and could have suffered damage that could lead to failure.

I find it interesting that my friends with 5th wheels ALL have suffered multiple blowouts. The common discussion about their tires is that trailer tires of good quality are hard to find in that size. I'm glad I live in a coach. That is only on of the reasons.
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