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Old 01-08-2015, 10:13 PM   #1
Join Date: Sep 2012
Posts: 56
Tire inflation after weighting motorhome

I have a class c motorhome coachman concord 225LE. I had the motorhome weighed at CAT scales. Front axle 4080 lbs and the drive axle 7,540. I have LT Uniroyal 225/75/R16E tires. The GVWR is 14200 lbs. the tire and load information on driver door states max front axle 4600 lbs with air pressure front tires 65 lbs, the rear axle duals 9600 lbs with 80 lbs of air per tire. i would like to know what air pressure to put in tires after weighing motorhome as i would like to put crossfire on rear tires but have to know lbs of air within 5 lbs to inflate tires, to order correct crossfire. Thanks in advance

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Old 01-13-2015, 07:39 PM   #2
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Join Date: Feb 2013
Posts: 474
You will want to search and find Uniroyal tire inflation data.

I have Michelin tire charts but that's all. Figure the weight on each tire and then look up the exact model and size of your tire. The chart will tell you what cold pressures should be for your weight. You might want to consider adding the weight of any passengers not in the RV when you weighed it and the weight of water, food, clothing and gasoline depending on how you expect to be configured when you will be on the road with your RV.

Since you have only axle weight, you should assume even weight left to right. For the front that would be 2040 pounds each wheel. You will need to divide the rear weight by 2 or by 4 depending on whether you have a single or dual tires in the rear.

For your add on weights, decide if the weight is over the front, rear, or center of your axles and figure accordingly.

Having your RV overloaded can be a serious issue so it's a good idea to go through this analysis as you are doing.

Good luck

Gary, Cindy, Reacher (Maine Coon), and Vivian (in spirit only now).
Retired: July 31st, 2013 and loving it.
2011 Coachmen Encounter 37 TZ pulling a 2012 Wrangler Unlimited Sahara. Many upgrades, additions, mods, and changes.
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motorhome, tire, weight

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