My 2022 Thor Aria 3901 had the stock 9 inch pads that in less than a year totally distorted parking on hard surfaces. These metal pads are the same ones used on 5th wheels weighing half as much as the motor home. They are grossly undersized for the intended purpose.
I recently put 4 new Lippert 9 in pads on so that I could install Snap pads. I wanted to be sure that the fit would be correct. No luck, after just 3 trips parking on concrete 2 of the pads fell off.
After speaking at great length with the Snap Pad reps they confirmed as I said earlier the 9 in pads are not rated for the weight. As a result they have warrantied many units due to this failure of design.
They strongly suggested going to the 12 inch pads. They feel the weight distribution over the larger surface area will minimize the distorting even though they are constructed in the same manner as the 9 in. They also said the warranty claims for the larger pads is nil.
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