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Old 03-25-2010, 02:21 PM   #1
Senior Member
Workhorse Chassis Owner
Join Date: Jul 2006
Posts: 292
Tire size question

My motorhome currently has 19.5 inch tires with load range "G" with load rating single-4540 and dual rating of 4410. These tires came from the manufacturer.
My tire dealer order the tires but recieved load range "F" whose rating is
single- 4080 and dual 3970.
The difference between "F" and "G" is single - 460 and dual rating of 440.
I weighed my motorhome empty and the weights were:
Steer axle: 6180 and drive axle of: 12740.
I did not weigh each axle. The scales that I used would only weigh entire axle. Will the "F" rated tires be safe or should I have the dealer reorder and try to find "G" tires? Thanks ...................

2015 Flagstaff Super V Trailer
Model 26VFKS
Towing with F150 Crew cab 5.0L
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Old 03-25-2010, 03:13 PM   #2
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Join Date: Aug 2009
Posts: 256
I do not know what chassis rating you have with your workhorse, but with your new tires, you can only carry 8160 lbs on the front axle, (depending on the axle rating) at full tire inflation. (marked on the sidewall.)
On the rear, the tires allow 15880 at full inflation. Myself, if it had G rated tires before, it would have G rated tires now.
Sounds like the tires are adequate, if you don't overload.
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