Join Date: Apr 1999
Location: Midland County,TX, USA
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Re: TOYO MT AIR PRESSURE
The tire industry strongly suggests you pump the tires up only to the PSI needed to support the load you are hauling on that tire. So use a load/inflation table, along with a weight ticket that shows the weight on each axle, and apply that table.
All tires that have a weight capacity of 3,195 pounds @ 65 PSI will have the same load inflation table. Here it is for your tires:
When unloaded, your weight ticket might show 4300 on the front axle and 3500 on the rear axle. Which is 2150 on each front tire and 1750 on each rear tire. So per the above load/inflation table, you'd need 40 front and 35 rear when unloaded.
Put the truck to work, and you might have 4600 on the front axle and 5200 on the rear axle. Or 2300 on each front tire and 2600 on each rear tire. So in that case the above table says 45 front and 50 rear.
Loaded to the gills and right up against the weight capacity of your tires, then you might have 5,000 on the front axle and 6300 on the rear axle. Or 2,500 on each front tire and 3150 on each rear tire. That means you'd need 50 in the front tires and 65 in the rear tires.
Note that with only 3,195 weight capacity per tire, an '05-up F-350 SRW no longer has a GVWR of 11,500 pounds. With a max load of 6,390 on the rear axle, a GVW of 11,500 would probably overload your rear tires.
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My Sierra Blanca in the sig pic was a great pickup for 11.5 years. I sold it a coupla years ago. I drove a hand-me-down 2003 F-150 SuperCrew 4.6L 2V for a while, but it was unacceptable for towing more than a rowboat. Replacement is a 2012 F-150 EcoBoost SuperCrew Lariat that tows my 5,000-pound TT like a dream.