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 > You're kidding...Right?

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wa8yxm

Davison Michigan (East of Flint)

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Posted: 11/10/21 04:39pm Link  |  Quote  |  Print  |  Notify Moderator

My class A liked 115 PSI

But there are ways to tell... One is to use a powder Flower Chalk both good

Dust the road in front of the tire and note the tracks

FULL width even pressure.... GOOD
edges not well pressed. Lower pressure
Center not pressed.. increase

Or chalk the tire drive a bit and note where the chalk is worn off
Center not worn more pressure. edges less. all evenly worn excellent.

But scaling is the best

Though I like to do every wheel separate and set accordingly.

Many do the axle/2 method. both seem to work.

ONE fact.. You will not wear the tread out...

Why is inflation important?

Too low the side walls flex generating heat and KBOOM you also have less control (Spin outs are easier to do), Trailers can sway more.

Too high and you have less control over the vehicle.


Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times


wolfe10

Texas

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Posted: 11/10/21 05:37pm Link  |  Quote  |  Print  |  Notify Moderator

I will go with tire manufacturer's recommendations rather than "do it yourself" evaluation. Do it yourself ASSUMES everyone is equally qualified to make these important safety decisions. NOT TRUE. Heck, it is hard enough to get most drivers to stop ignoring their "low tire" warning light.

They pay their engineers to do this for you!


Brett Wolfe
Ex: 2003 Alpine 38'FDDS
Ex: 1997 Safari 35'
Ex: 1993 Foretravel U240

Diesel RV Club:http://www.dieselrvclub.org/

Tom/Barb

Oak Harbor, Wa

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Posted: 11/10/21 07:04pm Link  |  Quote  |  Print  |  Notify Moderator

wa8yxm wrote:

My class A liked 115 PSI


Ours likes 100 PSI cold,


2000 Newmar mountain aire 4081 DP, ISC/350 Allison 6 speed, Wrangler JL toad.

JoeH

Apollo Beach,FL

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Posted: 11/11/21 04:32am Link  |  Quote  |  Print  |  Notify Moderator

wjschill - I see you are in Texas.... if you want to do it right, get a 4 ( or 6 if tag) corner weighing. Escapees RV Club will do it for you. They are in Livingston and will weigh and give advise regarding your questions. It's $45.


Joe
2013 Dutch Star 4338- all electric
Toad is 2015 F-150 with bikes,kayaks and Harley aboard

wjschill

Texas

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Posted: 11/11/21 08:28am Link  |  Quote  |  Print  |  Notify Moderator

OP here.

My wife is still "stocking" the mh. When she runs out of room, I'll get it weighed and use the tire chart.

Thanks for all your input....Very helpful...

Skip


KillingTime

Sandia Man

Rio Rancho, NM

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Posted: 11/11/21 10:36am Link  |  Quote  |  Print  |  Notify Moderator

If you have already done axle weights as you stated in your OP you are close enough number wise to adjust according to inflation charts. Every time we got new rubber on any of our RVs over the last 3 decades tire installer always put max psi as stated on sidewall, no real biggie as I would adjust psi to my preference. On our towable RVs we ran close to max psi, on our motorized RVs we run approximately 20# below max psi.

Sure, it would be nice to attempt to get your coach weighed on each corner believing you have the exact weight every time you hit the road, but real world numbers will never be that precise. How much water do I have in each tank, or did I purchase too much at walmart that tire inflation needs to be adjusted, come on folks on a 22K# rig a few hundred pounds in either direction is meaningless.

pianotuna

Regina, SK, Canada

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Posted: 11/11/21 11:21am Link  |  Quote  |  Print  |  Notify Moderator

wjschill wrote:



Now, I read that I should weigh all four corners to adjust each tire to the proper pressure. But, before I do so, fill the gas, propane, water, black and grey tanks, plus put in all our gear, tools, dogs, cats, and any people that might ride with us, before weighing.

Then add 5% for road temps, cold or hot.


Welcome to the forums!

Wheels on the same axle need to have the same pressure.

Enjoy your travels!


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

johnhicks

Wandering below the Gnat Line

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Posted: 11/11/21 11:22am Link  |  Quote  |  Print  |  Notify Moderator

DO NOT pay any attention to well-meaning suggestions to lower pressure or whatever someone else uses. Consult Toyo's chart and set your pressures accordingly, perhaps adding a few percent to account for cold-temperature changes. It may or may not be lower than 110psi; fwiw according to Toyo's chart I need 105psi in front and 110psi rear, so 110psi certainly can be the correct presure. The installer did the right thing since weight was unknown.


-jbh-

2oldman

Nevada

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Posted: 11/11/21 11:29am Link  |  Quote  |  Print  |  Notify Moderator

johnhicks wrote:

DO NOT pay any attention to well-meaning suggestions to lower pressure or whatever someone else uses.
Admonishment duly noted, but if you want a smoother ride, lower pressure helps.

LouLawrence

Traveling the US!

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Posted: 11/11/21 04:38pm Link  |  Quote  |  Print  |  Notify Moderator

Lower pressure is NEVER correct if you don't have your weights and you haven't checked the charts!

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