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03-12-2013, 04:58 AM
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#1
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Senior Member
Ford Super Duty Owner
Join Date: May 2009
Location: kingston tn.
Posts: 974
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tire guru needed
i have about 10k on my unit,80lbs in all tires per ford/goodyear stated rate on the chassis sticker. problem is both front tire show wear on the outside of the tires equeal on both tires inside and out, centre of tire is like new is this an inflation or alignment issue
brianj
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just liven life in east tn or where ever our
2011 georgetown ,2016 explorer and 2015 "hemi" ram take us
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03-12-2013, 05:03 AM
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#2
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Community Administrator
Join Date: Aug 2009
Posts: 53,561
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It could be both. The only proper way to set inflation is weighing the coach preferably each corner but at least each axle.
Cliff
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Cliff,Tallulah and Buddy ( 1999-2012 )
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03-12-2013, 06:46 AM
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#3
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Senior Member
Tiffin Owners Club
Join Date: Sep 2012
Location: Ambler, PA
Posts: 2,853
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Have tons of car & light truck experience here. Classic sign of under-inflation. We set all of our vans to maximum cold pressure for best mileage & performance. That is usually 65 or 80 psi, depending on the load range. On my MH I set them at 100 (max cold psi is 110).
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Larry & Cheryl Oscar, Louie, Ranger & Henry (our Springers)
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03-12-2013, 07:00 AM
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#4
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Senior Member
Tiffin Owners Club
Join Date: Oct 2011
Posts: 115
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Larry is right.That is under inflation need to run more air. Check your sidewall and try just under max.
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Don
2008 Tiffin Phaeton
360 Cummins
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03-12-2013, 07:15 AM
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#5
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Senior Member
Fleetwood Owners Club
Join Date: Jun 2009
Posts: 4,031
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If the Goodyear are G670. Then that is common with that tire.
Some call that rivering. No matter if the PSI is for the 4 corner weight or even a few pounds more.
You could change the wear on the old bias tires by changing the pressure.
Not so much on the new radial tires.
All 6 of my 22.5" G670's are wearing like yours. But will age out before ever getting down too the wear bars on the outside edges.
In 2 months mine will be 8 years old. I will replace them at 10 years or sooner if blow outs start to happen.
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99 Discovery 34Q ISB
2014 MKS AWD EcoBoost Toad
Fulltime Since "99"
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03-12-2013, 06:16 PM
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#6
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RV Mutant #14
Winnebago Owners Club Texas Boomers Club Freightliner Owners Club iRV2 No Limits Club
Join Date: Aug 2008
Location: Texas
Posts: 17,217
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Do the "chalk test." (Search on it)
I'm in a hurry this evening or I'd do it for you.
Edited: Found it. "You could also do the "chalk test." Take a piece of white chalk. Draw a line across the treads of each tire. Move the RV for a couple rotations of the wheels and then look at the chalk line. Just the center being rubbed off - to much air. Just the edges rubbed off - to little air. Rubbed off all across - just right. (so I have been told) (You an look at the chalk mark on the ground to see what the distribution is also.)"
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Wayne MSGT USMC (Ret) & Earlene (CinCHouse) RVM14 (ARS: KE5QG)
Lexi - Goldendoodle
2015 Winnebago Tour 42QD - 2020 Lincoln Nautilus Reserve
It is what it is, and then it is what you make of it.
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03-13-2013, 12:48 AM
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#7
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Senior Member
Monaco Owners Club
Join Date: Jun 2011
Location: Montana
Posts: 811
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Quote:
Originally Posted by Triker56
If the Goodyear are G670. Then that is common with that tire.
Some call that rivering. No matter if the PSI is for the 4 corner weight or even a few pounds more.
You could change the wear on the old bias tires by changing the pressure.
Not so much on the new radial tires.
All 6 of my 22.5" G670's are wearing like yours. But will age out before ever getting down too the wear bars on the outside edges.
In 2 months mine will be 8 years old. I will replace them at 10 years or sooner if blow outs start to happen.
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Rivering is generally not an even wear on the outer or inner tread patten. If you run your hands along the tread it goes up and down
The only way to solve this problem is to swap them to the rear. Dependent on the condition of the rear tires you may be just able to swap onto one side of the duals.
Then inflate as per tire chart - obviously more than current pressure.
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2005 Monaco Signature Castle 1V
2013 Subaru Outback Toad
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03-13-2013, 01:03 AM
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#8
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Senior Member
Monaco Owners Club Winnebago Owners Club
Join Date: Sep 2011
Posts: 7,469
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It can't be over stated, the only way to determine proper inflation pressure is by weighing your coach in as it is normally loaded/outfitted for travel.
You can get by weighing each axel but it much better to weigh each corner. Once the weights are known, use the tire manufacturer's chart to determine the proper pressure.
The "chassis sticker" does not take it to account the weight you added to your coach.
Running under inflated tires will at best shorten their life and could lead to a blow out.
If you can get corner weights they will also tell you how evenly your coach is loaded.
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US Navy Vet, Liberty Tree Member of Oath Keepers, NRA & VFW Life Member, Alaska EMT.
2009 Safari Cheetah 40 SKQ
2009 Winnebago Chalet 231CR
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03-13-2013, 03:17 AM
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#9
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Senior Member
Join Date: Feb 2010
Location: Sunnyvale, CA
Posts: 1,195
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I agree it sounds like classic underinflation. I would definitely get the coach weighed. It's really not a big deal (for me, it was 90% buildup of "are they going to tell me to get lost since I'm not a big rig?" and then turned out to be nothing with nothing... as easy as anything).
Steve
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The Green Machine -- 2000 Mountain High Coachworks Summit (Spartan chassis / Cummins ISC)
...and F-Troop: Fearghus, Fiona, and Frankie (Cairn Terriers)
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03-13-2013, 07:43 PM
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#10
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,713
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Meanwhile, add at least 10 psi to those tires cause you are running dangerously soft. Then get to the weigh station, then look up the required pressure in the tire manufacturers inflation tables.
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Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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03-13-2013, 08:00 PM
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#11
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Senior Member
Join Date: Feb 2010
Posts: 4,654
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The tread wear not much help on radial tires.
Could be alignment, ride height, wheels change angle with height ifs, so there are a few options
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Tony & Lori
1989 Country Coach Savannah SE
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03-13-2013, 08:12 PM
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#12
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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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Quote:
Originally Posted by sdennislee
The "chassis sticker" does not take it to account the weight you added to your coach.
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The sticker on the coach is for the MAXIMUM capacity of the axles with the original brand/size/model of tire and takes into consideration the weight of the rig and everything you've added, not as said above. That rating may be the actual rating of the tires/wheels/axle or braking capacity. It is the LOWEST of any of them.
It is only useful if you've never weighed the rig and need a starting point.
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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03-13-2013, 09:49 PM
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#13
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Senior Member
Monaco Owners Club Winnebago Owners Club
Join Date: Sep 2011
Posts: 7,469
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Quote:
Originally Posted by Mr_D
The sticker on the coach is for the MAXIMUM capacity of the axles with the original brand/size/model of tire and takes into consideration the weight of the rig and everything you've added, not as said above. That rating may be the actual rating of the tires/wheels/axle or braking capacity. It is the LOWEST of any of them.
It is only useful if you've never weighed the rig and need a starting point.
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My chassis sticker only considers the empty weight of the coach plus fluids.
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US Navy Vet, Liberty Tree Member of Oath Keepers, NRA & VFW Life Member, Alaska EMT.
2009 Safari Cheetah 40 SKQ
2009 Winnebago Chalet 231CR
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03-14-2013, 07:54 AM
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#14
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Moderator Emeritus
Join Date: Jan 2000
Location: West Palm Beach, FL. USA
Posts: 27,713
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Quote:
My chassis sticker only considers the empty weight of the coach plus fluids.
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The weight shown on the sticker is as you describe (the UVW), but I'll bet the tire pressures are for the axle GAWRs, which is the max axle capacity.
__________________
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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