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mdecastra's avatar
mdecastra
Explorer
Jul 18, 2015

Tire Pressure

I bought used, from dealer, a 2014 Fleetwood Southwind 32VS. Just weighed it as follows: Full Gas Tank, 2/3 Full Fresh Water, 1/3 ea on Grey and Black, Fully packed incl DW. Front axle weight is 6,880 lbs...Read axle weight is 19,480 lbs. Tires=Michelin R235/80 XRV @ Max single 4675 dual 4410.

1) Are my tires rated to handle my unit?
2) What PSI should I run, per axle?

It appears my front is under weight and rear is over weight. Can I run rear ties lower PSI that rear.

I also have a TPMS 507RV/SG which I can program different tires for different pressure and temp.
Class A
  • KD4UPL's avatar
    KD4UPL
    Explorer
    Jul 18, 2015
    You are overweight on your rear tires. The question is are the tires under rated for the chassis or are you exceeding the weight limits of the chassis?
    What's your GRAW rating on your door sticker? With those tires it should be around 16,000 or 17,000. If it is then your exceeding the weight rating of the whole rear axle, not just the tires.
    I don't know what that axle is really rated for by it's manufacturer. It may be that the GRAW is based on the tires they installed on the motor home. You could install higher rated tires and be fine, or maybe not, depending on the actual weight carrying abilities of the axle assembly.

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