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07-28-2017, 07:20 AM
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#1
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Senior Member
American Coach Owners Club
Join Date: Jan 2017
Location: USA
Posts: 480
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Dually Air Pressure
Would 3 psi difference between inside and outside duals be OK?
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Full time and loving it!
2008 American Eagle 42F, Cummins 8.9l ISL
2014 Honda CR-V as TOAD
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07-28-2017, 07:27 AM
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#2
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Senior Member
Join Date: Sep 2016
Posts: 710
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If you're asking will it cause sudden catastrophic failure, no. But it isn't going to help anything either. By having one tire under or over inflated the weight isn't evenly distributed between the two tires. The harder one will run hotter and the softer one will slip slightly. When it's convenient for you get them inflated to the same pressure.
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07-28-2017, 07:29 AM
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#3
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Senior Member
Join Date: Sep 2016
Posts: 710
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You will want to watch the softer one to make sure you don't have a slow leak starting.
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07-28-2017, 07:36 AM
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#4
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Senior Member
Fleetwood Owners Club Freightliner Owners Club
Join Date: Nov 2010
Location: Texas
Posts: 4,283
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With 16 ply tires and as hard as the rubber is 3 lbs won't hurt anything. 10 lbs difference might. Proper pressure for tire size and vehicle weight is most important.
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2015 Fleetwood Discovery 40E on a Freightliner XCS chassis with a Cummins ISL9 pulling 1 and/or 2 motorcycles, '07 Honda Accord OR a 17' Runabout Boat.
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07-28-2017, 08:14 AM
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#5
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Senior Member
Join Date: May 2012
Posts: 3,289
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My thought is that you will almost always have a slight difference in psi. When the outer tire is in the sun it will have more psi than the inner if both tires had the psi in the shade. I don't think 3 is a big deal.
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07-28-2017, 08:47 AM
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#6
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,626
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Quote:
Originally Posted by AITG
If you're asking will it cause sudden catastrophic failure, no. But it isn't going to help anything either. By having one tire under or over inflated the weight isn't evenly distributed between the two tires. The harder one will run hotter and the softer one will slip slightly. When it's convenient for you get them inflated to the same pressure.
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X2!
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Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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07-28-2017, 11:04 AM
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#7
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Senior Member
Join Date: Dec 2013
Location: Lake Havasu City, AZ & Plover, WI
Posts: 6,403
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As long as both tires are inflated to a safe pressure for the load they are carrying, niether the tires or you will know the difference. You would have to chase pressures for a long while to get them all the same all the time. Before TPMS, 3-4% differences didn't matter as long as the "Thumper" yielded the same sounds and they felt ok. Now, some try to micro-manage tire pressures beyond necessary. JMHO
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2006 Monaco Executive 44 Denali
2013 43 QGP Allegro Bus ( SOLD )
2013 Avalanche
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07-30-2017, 09:39 AM
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#8
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Member
Join Date: Jul 2017
Posts: 67
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^ What Crasher said x2
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07-30-2017, 09:49 AM
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#9
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Senior Member
Country Coach Owners Club Solo Rvers Club iRV2 No Limits Club
Join Date: May 2011
Location: Vancouver, WA
Posts: 37,725
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One trucker magazine ran a test some years ago. They set a truck up with various tire pressures and had 50 OTR drivers "thump" them. Only 2 of the 50 were able to distinguish the 20% low tires and none detected those that were 10% underinflated.
Get a good tire gauge and use it.
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