jhomuth
Dallas, TX
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So I've read in the past in this forum about people airing up all 4 tires on their TV to max pressure. I've got a 3/4 ton Suburban with LT's, and right now they're at 50 on the front, 80 on the back, which is what the door sticker recommends. We have a relatively light trailer, about 5000 lbs. loaded, very low tongue weight, just a few hundred pounds. Are the tires fine as they are? Should I have DH air up the fronts to match the rears, or would that be overkill for as light a trailer as we have? We leave on a 2500 trip in a few days, and would appreciate any advice!
Jessica, Scott, and our kiddos 4 and 2
2001 Suburban 2500
2007 Skyline 247 LTD
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kaydeejay
SE Michigan, USA
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Joined: 07/26/2004
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The recommended tire pressure on the door label is for a vehicle loaded to its GVWR. As long as you are at or under your max rating those pressures are fine.
I suspect the 80psi is absolute max (per the tire sidewall) for the rears anyway.
I have 5000# (approx) on my rear tires. I run at 65psi as I am 1000# UNDER their combined max rating of 6084#.
Keith J, Retired from GM Engineering
2005 GMC Sierra 2500HD SLE 2WD/CC/SB/DA.
1999 Sunnybrook 27RKFS Fiver
Bilsteins, Line-X, Westin steps, Prodigy, Retrax, 16K Superglide, 5th-Airborne pin-box, Multi-vex mirrors.
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reno82
Cardiff by the Sea, CA
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No, stick with the recommended pressure. You could probably run less with a light trailer but it's a guessing game. Too much and you wear out the center of the tire, too little and you can hurt control and lose MPG's. The safe bet is to run the 50/80 as the door says.
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jmramiller
Dallas
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Joined: 01/24/2006
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reno82 wrote:No, stick with the recommended pressure. You could probably run less with a light trailer but it's a guessing game. Too much and you wear out the center of the tire, too little and you can hurt control and lose MPG's. The safe bet is to run the 50/80 as the door says.
If you run the rears at 80 and you are not at the max load rating then you are already wearing out the center.
Most tire makers have a chart on their website which shows what the psi should be based on actual weights. You can remove all the guess work by going to the local CAT scale and weighing the load on each tire. Then simply adjust the air in each tire according to the chart. Unless you change your loading significantly then once or twice at the scales should give you a real good idea what levels you need to set your tires.
2006 2500HD CC SB 4X4 Duramax/Allison
Prodigy/16K Reese/265E Tires/Bilstein Shocks
RM Active Suspension/RDS 60gal Toolbox combo
2008 Big Country 3490BHS by Heartland
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winkyb
Florida
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I my self do keep a one ton E 350 at 80 PSI all the way around But that is just me.I like a stiff ride on open high way.On the front I would think it would just be up to how it felt to you with the trailer.At 80 PSI you will feel the road more. And if on ruff road not that good on the front end.
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rdturn
Indepenence, MO. USA
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I run 60 in the front and 80 on the rears during towing season. I have LT series tires (Load range E).
-Roger
2007 Forest River Salem 28FBSS
2006 F-150 Ford 4x4 S/B
More picutes
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chadsalt
sc
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With that light of a trailer you dont need 80 psi in the rear.........and you sure dont need 80 psi in the front. With my Dmax and 6000# TT, I run 60 psi front and rear. The tires on your Burb are probably the same size as my Dmax, and youre no where near as heavy to start with. Tire wear and lack of tire contact patch during braking/steering are the primary concerns with overinflation.
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8.1 Van
Millstone NJ
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I have 70 psi front and 80psi rear in my LT265/75R16E's and the 3500 Vans have 1,000 lb higher GVWR than the 2500 Suburban.
FKA PSDExcursion
2002 Chevy Express LS 3500 8.1 155" WB passenger van 3.73 posi (GT4/G80)
41 Ft 2003 Thor Citation 41-ZBSR TT w/ Hensley Arrow
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portablevcb
Tijeras, NM
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I have always put more air in the tires than mfg calls for in all my vehicles (eg, 40 vs 32). Roughens the ride a little and decreases absolute cornering traction. I get a small increase in mileage as well (<1mpg). Very little change in tire wear. In these days of steel/kevlar/aramid belted tires you won't see much change in wear vs inflation pressure unless you run very low pressures.
Never exceed pressure on tire sidewalls.
charlie
2006 Toyota Tundra Crew Cab
2003 Skyline Nomad 24ft Fiver
Me and Wife
Maggie the Old English Sheepdog
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jhomuth
Dallas, TX
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Thanks so much for all the info, this was just the sort of information I was looking for!!!
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