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08-31-2015, 09:06 PM
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#1
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Arn
Join Date: Aug 2009
Location: Ottawa Valley, Ontario
Posts: 181
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LT Tire PSI
Just upgraded my old Ford to a new Silverado. It's the first vehicle I've owned with LT tires so bear with me. I know they are capable of 80psi but I don't want to roll down the road on rocks like Fred Flinstone since I really don't need them at max pressure. They came from the dealer with 38psi which I'm thinking might be a bit low for me. My travel trailer weighs 7,000lbs with a tongue weight of about 860lbs so I'm wondering if some of you tire geniuses can tell me what you run for psi. Thanks.
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Arn
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08-31-2015, 09:15 PM
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#2
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Senior Member
Join Date: Jul 2011
Location: Stromsburg, Nebraska
Posts: 1,682
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I've always run tires at their max cold pressure rating stamped on the sidewall. Don't think the ride will be that much different and I think you'll get improved wear and milage with a higher pressure, but that's just me. I'll be interested to hear other ideas
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Joel and Teresa
2016 Sabre 34TBOK
2006 GMC 3500 CC LB DRW 4X4
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08-31-2015, 09:15 PM
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#3
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Senior Member
Join Date: Sep 2013
Location: Idaho
Posts: 9,839
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I run my Coopers at 80 PSI because I do not wish to spend the time airing them up and down.
No undue tire wear, yes it does ride like a truck not sure how that worked out.
Dump the stock shocks and buy some good ones.
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2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
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08-31-2015, 09:29 PM
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#4
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Senior Member
Join Date: Feb 2015
Location: Oswego il
Posts: 2,430
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I would suggest that you run the tires at max air pressure when towing and air them down when not towing.
Now the best thing to do is weight the truck and trailer to find your rear axle weights. Then air the tires per the scaled weight to support the tire load which may be less then the 80 psi would support.
This is what I do when I run my towing tires durning the towing season. I have two sets of tires and rims, so I have winter tires and my summer towing tires. The towing tires are run at 70 psi rear which supports a load of 3415 lbs. my tires are LT285/70R/17 126R
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Jim W.
2016 34RL CC; 2008 Ram Mega Cab 2500HD, 6.7L, 68RFE 6 speed, 4X4, Smarty S67, TDR 145K+miles
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09-01-2015, 12:04 AM
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#5
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2007 WildCat 32QBBS
Join Date: Jul 2011
Location: NJ
Posts: 2,349
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Read the recommended tire pressure that is posted on a sticker in the door jam, B pillar down low. This will give you a good starting point. See how it works for YOU, and adjust accordingly.
There's no other cut and dry answer. Most other answers will be based on someone else's experiences and opinions. You need to form your own to figure out what works best.
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*Current: 2005 Ford F350 Crew Cab Dually 6.0 diesel 4x4*
*Retired: 1987 F350 Crew Cab Dually 6.9 turbo diesel
2007 Forest River WildCat 32QBBS
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09-04-2015, 06:44 PM
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#6
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Senior Member
Join Date: Apr 2013
Location: Northeast CT
Posts: 315
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My old Cummins Dodge I'd run 50 in the front and 35 in the rear when empty. That kept a nice even tread wear. Loaded they'd go to 80.
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2013 Rockwood 2109S
2010 Dodge Ram 1500 Crew Cab 4x4 Hemi
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09-04-2015, 07:09 PM
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#7
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Senior Member
Join Date: Jan 2014
Location: Chantilly, VA
Posts: 1,075
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When loaded mine go to max psi. Unloaded I run them at 40 psi.
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Lee and Anne
2016 F250 2WD CC SB XLT 6.2 3,295 lb payload cap.
2014 Salem Hemisphere 282RK 8k lbs loaded, Equal-i-zer WDH, TST 507 TPMS
2021: 35 nights already booked so far
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09-07-2015, 11:16 AM
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#8
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Arn
Join Date: Aug 2009
Location: Ottawa Valley, Ontario
Posts: 181
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I just towed at 38psi & had no issues. We have a few more trips this season so I'll be packing my portable compressor & doing a lot of trial & error. Thanks all for the helpful info!
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Arn
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09-07-2015, 12:06 PM
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#9
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Senior Member
Join Date: May 2014
Location: Waterloo Region
Posts: 729
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38 is too low for an LRE LT tire at anything other than minimum weight. I run 65 front, 77 rear (cold) during towing season. I'll go to 55/70 in the off-season.
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2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam
 Self restraint is for the young. I'm old and want it NOW!
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09-07-2015, 12:14 PM
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#10
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Senior Member
Join Date: Sep 2015
Posts: 3,464
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Quote:
Originally Posted by DaveSchwartz
38 is too low for an LRE LT tire at anything other than minimum weight. I run 65 front, 77 rear (cold) during towing season. I'll go to 55/70 in the off-season.
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X2
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2017 Dynamax Isata 4
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09-07-2015, 12:37 PM
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#11
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Senior Member
Join Date: Apr 2013
Location: Northeast CT
Posts: 315
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70 in the rear with an empty truck? Wow, that thing must ride like a stagecoach and wear the center of the tire quickly. 35 in the rear of my old Dodge empty and the tires wore dead even across the tread. 55 in the front with the Cummins and they wore perfect. I got 80k out of multiple sets of Michelin LTX tires. Definitely air up when loaded but empty you don't need to go crazy.
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2013 Rockwood 2109S
2010 Dodge Ram 1500 Crew Cab 4x4 Hemi
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