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Old 08-13-2016, 06:42 AM   #1
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tire size

I purchased a used RV. A georgie Boy cruisemaster III. It had 19.5 inch rims when I bought it, however the GVWR sticker inside has 22.5 inch ties on the sticker. Is it dangerous to run the wrong tires?. Will it make the RV ride differently. ( the RV seems to ride rough)

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Old 08-13-2016, 07:56 AM   #2
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In my opinion the only concern with running tires with a smaller diameter would be the speedometer would read wrong.
However, for safety sake check the load rating for the 19.5 tires to see that they meet the standard that you need for the weight of the coach, and check the age of the 19.5 tires. Very important. The 19.5 tires should cost less than the 22.5's.

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Old 08-13-2016, 10:30 AM   #3
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you might want to check the year of your coach online to see if it did have 22.5 tires on it when new.
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Old 08-13-2016, 10:56 AM   #4
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Welcome to iRV2.

Is your coach is on a Ford chassis , or Workhorse ?
Both manufactures used both sizes of rims , Workhorse on those of lower GVWR, under 20,000 I believe . Ford used the smaller wheel up to a certain year.
Is the serial number on the tire size decal correct for your chassis?
Wouldn't be the first time a decal was installed in the wrong coach.
As others have said you need to check the tire's age and load weight rating.
As far as the rough ride is concerned , your need to weigh the coach; 4 corner is best ; loaded for travel and set your tire pressures according to the tire manufacturers inflation chart . The inflation chart is available on line.
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