Another tire pressure question.

[testerdennis]

Sorry for this I have been reading posts on tire pressure and can't seem to figure it out. We are leaving from Ontario Canada next week and heading to Florida. We own a 36 foot Holiday Rambler Vacationer with the Michelin tires rated at maximum 110psi. Can someone suggest a safe psi for my tires as I dont have the time or place to get the Rig weighed.
Thank you

[testerdennis]

Sorry for this I have been reading posts on tire pressure and can't seem to figure it out. We are leaving from Ontario Canada next week and heading to Florida. We own a 36 foot Holiday Rambler Vacationer with the Michelin tires rated at maximum 110psi. Can someone suggest a safe psi for my tires as I dont have the time or place to get the Rig weighed.
Thank you

[SacsTC]

There is no way for us to actually answer this question. As long as you are positive you are not overloaded, use the pressures listed on the sticker that should be on the wall by the drivers seat. That is the pressure to carry the load the axles are rated to carry using the tires supplied by the manu.
In order to set pressures accurately, you need to know the weight of rig as loaded for travel, tire manufacturer, and tire size.

[Elkhartjim]

The rig can be weighed at most any truck stop. Lets see, 10 minutes to get weighed or 4to unknown hours on the side of the Interstate with a blown tire waiting on road service. Sounds like good time management to get the rig weighed and then you will know what the correct tire pressures should be.
Havbe a safe trip.

[pipedream2]

testerdennis
If you are crossing at Windsor or Sarina there is a Flying J on 401 westbound at London with registered scales for $5.00 and all the cheap gas/diesel/propane you can handle complete with free air to adjust the tires for proper weight.Too much = bad traction on wet or snowy roads....too little = overheat and blow...you have options take the time...its 10 seconds from the hyway

[pipedream2]

testerdennis
If its the actual tire pressures for a given weight you need you must tell us the size of the tires ...as that is crucial.Not just Michelin...19 or 22.5 dia.?? is the chassis Workhorse??/ more info needed here

[Elkhartjim]

I sure hope he takes the time to read our posts Dennis.

[pipedream2]

Elkhartjim
My sentiment exactly and if he is going to FLA 75 is the best winter rout from Ontario....he will hit snow but its flatter that 95.and therefore will drive right past London Flying J....I believe hes on line now....

[testerdennis]

Workhorse chassis, 22.5 dia tires. I will be taking I75. I checked my tire pressure yesterday and they are all at 90 psi.

[Elkhartjim]

My 08 Fleetwood Bounder 38S Diesel Pusher
Tire Goodyear G670 RV 275 70R22.5
Freightliner

Gross weight is 25140 lb
Front weight is 8660 lb 90 psi
Rear Weight is 16470lb 85 psi

Tires are rated at max cold pressure of 120psi

Please, go get it weighed. Otherwise its just guessing.

All pressures are measured cold.

[SacsTC]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by testerdennis:
Workhorse chassis, 22.5 dia tires. I will be taking I75. I checked my tire pressure yesterday and they are all at 90 psi. </div></BLOCKQUOTE>
If you are using 235/80R22.5 LRG Michelin tires and have the Workhorse 22.5 chassis, then you have an 8000 Lb front axle rating and a 14,500 Lb rear axle rating. If so, then this chart is the one you would use.
<span class="ev_code_RED">235/80R22.5 LRG XRV®, XZE® </span>
(The above link only takes you to the inflation tables...You then need to click on the 22.5 tire size to get to the proper table.)
It shows that at 90lbs, your front tires can carry 4140 lbs per tire for a total weight of 8280 total. Your axle is rated at 8000
Your rears at 90 can carry 15,060 total. Your axle is rated at 14,500
Assuming all the above is correct concerning tire size and chassis, it looks like you are OK. You do not normally inflate your tires to the max rating on the side of the tire.

[testerdennis]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content"> If you are using 235/80R22.5 LRG Michelin tires and have the Workhorse 22.5 chassis, then you have an 8000 Lb front axle rating and a 14,500 Lb rear axle rating. If so, then this chart is the one you would use.
235/80R22.5 LRG XRV®, XZE®
(The above link only takes you to the inflation tables...You then need to click on the 22.5 tire size to get to the proper table.)
It shows that at 90lbs, your front tires can carry 4140 lbs per tire for a total weight of 8280 total. Your axle is rated at 8000
Your rears at 90 can carry 15,060 total. Your axle is rated at 14,500
Assuming all the above is correct concerning tire size and chassis, it looks like you are OK. You do not normally inflate your tires to the max rating on the side of the tire.
</div></BLOCKQUOTE>



Thank you very much for all your help. The tire chart is really helpful. I feel much better now. I think that I will get the Rig weighed just for piece of mind.
Thank you to everyone.

[Tom N]

Stop at a Cat scale. Their locations are on the Cat Scales website. Cost last years was $8. Pull on the scale up to the box with the push button to talk box. Push the button. A girl from the store will come on and tell her you want both axle weights and the total weight. When done pull off and park so you don't block any trucks. Go in and get your certified weigh slip.

As soon as possible have each wheel position weighed. You can get this down at many motorhome rallies. Come to the 2009 iRV2 National Rally in Ohio in June and get it down for FREE.

-Tom

[Nonno]

At the scales the weight and correct pressure can be determined but keeping in mind the tires are hot at the scales would it be advisable to wait until the tires are cold before taking and adjusting the pressure?