CampingN.C.
North Carolina
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Joined: 11/05/2004
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Got new tires on truck and trailer,same size on both but went from C to D range on camper and from a passenger C range to an LT E range. Something feels different. Im running max psi on all. Trailer feels like its all over the road,not swaying just touchy. Is the stiffer sidewalls and higher psi something that should change everything that much? Maybe its in my head, just seemed like I was 10 and 2 all day
1999 Suburban 454/ 4:10 (GAS HAWG)
2000 Skyline Nomad 3010
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Turtle n Peeps
California
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CampingN.C. wrote:Got new tires on truck and trailer,same size on both but went from C to D range on camper and from a passenger C range to an LT E range. Something feels different. Im running max psi on all. Trailer feels like its all over the road,not swaying just touchy. Is the stiffer sidewalls and higher psi something that should change everything that much? Maybe its in my head, just seemed like I was 10 and 2 all day
New tires are like new shoes. with some of them you should break them in a bit before you go towing.
It's called tire squirm and it happens in "some" new tires with deep tread. So no, your not crazy. 
Let them break in a bit and see how they feel. Bet it gets better. 
~ Too many freaks & not enough circuses ~
"Life is not tried ~ it is merely survived ~ if you're standing
outside the fire"
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JIMNLIN
out here
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Joined: 09/14/2003
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Hmmm a passenger C load range ??? There are no passenger C range tires. Its either a LT load range C or a passenger (P) tire.
Many times a D tire is a bigger/wider size tire and requires a wider wheel and is 65 psi rated. Mounting a wide tire on a narrow wheel can create carcass roll just as you describe. Also the tires tread is bowed out in the center and will create handling issues like you describe and braking issues. the tire is simply rollong on the center of the tread.
And as suggested the tire needs to wear in before it stops tread squirm.
"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers
'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach
'97 Park Avanue 28' 5er 11200 gvwr two slides
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lbrjet
Liberty, IN
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If you are running 80 in the truck tires let some out, like at least down to 60 and maybe even 50. 80 psi is for hauling a 2500lb pin weight on a fiver.
2010 F250 4X4 5.4L 3.73 LS
2011 Flagstaff 831FKBSS
Equalizer E4 1200/12000
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Jayco254
Eastern Missouri
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You could have too much air in the tires and are just running on the centers. Let some air out so you're getting full tread contact on the road hopefully that will help your handling. Try letting out about 5 pounds of air then test drive and see if that makes a difference, if still not good try it again. If the handling improves then play with the pressure a few pounds at a time until it feels right.
Tom, Kathy, Nikki, & Kelly
Pets: Lady - Texas Heeler, Dinger - Rhodesian Riidgeback Mix
2008 Ford Expedition Eddie Bauer 4x4 5.4 ci 3.73 gears
2008 Dodge Ram SLT Big Horn 4x4 5.7L Hemi 3.92 gears
2007 Jayco Jayfeather EXP 254
Husky W/D, P-3
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CampingN.C.
North Carolina
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Ill try dropping the psi on the truck but what about the trailer? I just asumed I should run max pressure in all.
The tires that were on the truck before were P "standard load" and I thought that was a C rating. Either way they weren't correct for a 3/4 ton.
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Road Ruler
Canada
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Sounds good. Keep experimenting. You may not be in the sweet spot yet.
The biggest mistake made is running tires at max pressure when the load is less than the load rating of the tire.
Airstreams.... the best towing trailers on the planet!
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mikestock
Vestavia Hills, AL, USA
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Joined: 12/01/2002
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Some types of tires do this. I had Goodyear Wrangler ATS, load range E, installed on my truck about 12,000 miles back and the truck drove as you described for about 5000 miles, before it got better. The original and first replacement sets were Continental and they never did this.
2005 F250 Crew Cab LWB Power Stroke, 2007 Montana 3500RL Fifth Wheel,Honda EU3000IS, Twin Honda EU2000i's, S&W security system
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CampingN.C.
North Carolina
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Well I dropped the truck to about 70psi (max 80) and the trailer to about 50psi (max 60) for the ride home and man what a difference it made! And I had a lot more wind today in the mountains. Cruise control and and hand on the wheel today, much better than the ride up. Amazing what a few pounds of pressure will do.
Thanks for all the advice!!
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APT
SE Michigan
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You probably only need around 60psi in the Burb. But the first 1000 miles or so on new tires can be very squirmy.
A & A parents of DD 2005, DS1 2007, DS2 2009
2011 Suburban 2500 6.0L 3.73 pulling 2011 Heartland North Trail 28BRS
2012 VW Passat TDI
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