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Old 07-12-2016, 01:52 PM   #1
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Tire Pressure Question

So the little plate next to the driver's seat of my class A recommends 80 psi for all my tires. However, I'm not sure if that should be adjusted due to load or not. Also, I tow a pretty heavy car behind. It's a Ford Flex at 4,500 lbs.

Thanks for any advice.

also, any advice on pressure guages and ways to add air cheaply and conveniently?

Thanks.
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Old 07-12-2016, 02:10 PM   #2
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What kind of a rig do you have? I would weigh all 4 corners or at least each axle then check your brand of tires for psi recommendations for weight, most manufactures post the pressures online. I would not just go by the placard because pressure varies for each brand/size of tire. Until you weigh it go by the max sidewall pressure marked on the tire and maybe drop 5 lbs. I use a sears 150psi compressor.
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Old 07-12-2016, 02:10 PM   #3
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If you're towing the Flex, the only weight added to the RV is the weight of the tow bar.

If you get the RV weighted, you'll have the information to adjust tire pressures for the load they're carrying. Once you have the numbers for the axle loads, you can look up the tire manufacturer and find tables that give PSI for the weights they're carrying.
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Old 07-12-2016, 03:07 PM   #4
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tire pressure question

Toad on a towbar does not factor into coach tire pressure.
Weighing the coach and using the tire manufacturers pressure charts are the way to determine proper tire pressures.
Milton tire pressure gauges are very good, I've a couple now for many years.
Several folks here carry small air compressors. The pancake type are popular, as are units from ViaAir, also a Craftsman/Porter Cable unit. Several threads here discussion in air compressors, findable via the search feature.
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Old 07-12-2016, 08:48 PM   #5
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Quote:
Originally Posted by BFlinn181 View Post
If you're towing the Flex, the only weight added to the RV is the weight of the tow bar.

If you get the RV weighted, you'll have the information to adjust tire pressures for the load they're carrying. Once you have the numbers for the axle loads, you can look up the tire manufacturer and find tables that give PSI for the weights they're carrying.
Where do I get it weighted and do I fully load it first, gas and all?
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Old 07-12-2016, 09:34 PM   #6
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Load the RV as if taking a trip so you get a true weight. Truck stops, Grain elevators, some highway inspection stations with scales will do it for you. You can also do a Google search of your area and find listings. Best information is to get 4 corner weights, but that requires 2 passes on the scale platform, once both sides per axle, then second pass one side per axle.
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