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Old 09-26-2015, 08:44 AM   #1
Junior Member
Join Date: Jan 2013
Location: Burleson, Texas
Posts: 10
tire data doesn't match

We have a 2013 Georgetown 378TS XL and I have been trying to get my tires aired up right. I recently bought a TPMS and as I was gathering inflation info I found that the Ford data sticker says 235/80R22.5G with a 22,000 GVWR. Right below that sticker is a Forest River data sticker says 255/80R22.5G with a GVWR of 24,000. The motorhome has the tires listed on the Ford data sticker. So does that mean Forest River should have changed the tires to the 255/80 or is this just a case of a wrong data sticker from Forest River. Anyone else seen this on their motorhome?

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Old 09-26-2015, 08:56 AM   #2
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Join Date: May 2013
Location: Munith, Mi
Posts: 155
Some of the earlier 2013 378TS models had the 235 tires and a 22,000 Chassis. The later 2013 378TS have the 255 tires with a 24,000 lb chassis. I have a later 2013 with 255 tires and a 24K chassis, but an different 2013 378TS we looked at had the 22K chassis and 235 tires.

Mickey & Sue Stamper
2013 GT XL 378TS
Fire Mist

2013 Ford Escape on Landgrebe tow dolly
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Old 09-26-2015, 12:30 PM   #3
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Join Date: Jun 2015
Posts: 441
My sticker says to inflate to 100psi (2001 Mirada). When I look at the tire pressure / weight table for my particular tire, 100 psi is the highest pressure recommended for any weight the tire is designed for. I suspect this is a generic pressure (100psi) and Coachmen simply tells everyone to inflate to this pressure.

HOWEVER - After I weighed my MH fully loaded and got the weights for each axle, I then looked at the tire pressure-to-weight tables for my actual weights. I found I could operate all 6 tires at the minimum recommend tire pressure of 70 lbs. (The lowest recommended tire pressure for that tire)

I chose to inflate all my tires to 75psi, which is well above the minimum for my tire and weight, and I believe contributes to a little smoother ride.
2001 Coachmen Mirada (Ford F53 6.8L V10) - Toad 2001 Civic
It won't do MACH 2, but I can get a sandwich and take a pee.
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Old 09-26-2015, 12:45 PM   #4
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Join Date: May 2012
Location: Northeast Alabama
Posts: 103
There has been a lot of previous discussion on this. I have a 26000# chassis on a 2012 337, and keep the tires at 90 psi cold, which was recommended by other threads. The ride is fine. The tpm shows an increase of psi up to as much as 105 depending on the temperature, but when cold they return to 90.
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