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04-10-2016, 12:27 PM
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#1
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jim
Join Date: Jun 2015
Posts: 13
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changing tires from load range c to load range d
Iv been reading on here about load c rated tires, so I went out and looked at mine to see and that's what forest river put on mine. This camper has pulled kinda hard and Im going to put some load D range tires on my camper. can anyone tell me were to put a jack under the camper to lift to take off the tires so I can take them to a tire shop. I don't trust tire shops at all so Im taking them off my self. 2016 windjammer 3029W Also wondering if I should have them balanced?
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04-10-2016, 01:28 PM
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#2
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Member
Join Date: Jun 2013
Posts: 75
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I jack up from the frame as close to the axles as I can using blocks and bottle jacks.
Sent from my iPhone using Tapatalk
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04-10-2016, 01:32 PM
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#3
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Senior Member
Join Date: Sep 2010
Location: Eastern Ontario
Posts: 4,167
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__________________
Fonzie
2011 Rockwood 8319SS with ProPride 3P hitch/GoodYear Marathons/TST TPMS 507
2019 F350 Ruby Red 6.7l diesel 3.31 axle electronic locker
Yamaha 3000iseb generator:Progressive Ind. EMS-HW30C : Eastern Ontario
Nights Camped: 2014 (18) 2015 (18) 2016 (36) 2017 (32) 2018 (42) 2019 (28) 2020 (35)
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04-10-2016, 09:08 PM
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#4
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Senior Member
Join Date: Sep 2010
Posts: 2,219
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Yep, I jack right between the tires as in the first picture of the posted thread.
2010 F250 5.4L 3.73
2011 Flagstaff 831FKBSS
Equal-i-zer 4pt 12K
__________________
2011 Flagstaff 831FKBSS
2010 F250 4X4 5.4L 3.73 LS
EQUALIZER E4 1200/12000
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04-11-2016, 11:25 AM
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#5
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Senior Member
Join Date: Sep 2014
Location: Western AZ
Posts: 2,404
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I would think you would want to have them balanced.
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04-11-2016, 11:43 AM
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#6
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Senior Member
Join Date: Jul 2015
Posts: 426
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You say that the trailer " pulled kinda hard " , new tires will not help that !
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04-11-2016, 11:56 AM
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#7
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Senior Member
Join Date: Mar 2014
Location: Watauga, Texas
Posts: 697
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Balanced, yes. And if you decide to have a tire shop do the change out make sure their guys don't come rolling out a shop jack and put it under your axles. If I hadn't been standing where I could see them they would have bent my axles, even after I told them not to jack on the axle.
Do you have a TrailerAid? If not they are something you should have in your WJ as they allow you to lift one tire at a time without any jack at all. Great investment.
__________________
D_B Travelers - 39 nights in 2018, 58 nights in 2017. [U]1st love: 2014 TT WJ3001w, now 2016 40' FW SOB, 2015 GMC 3500HD CC DRW Duramax, TST 507rv TPMS.
"Happiness? A good meal, a good cigar and a good woman - or a bad woman; it depends on how much happiness you can handle."
George Burns (1896 – 1996)
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04-11-2016, 12:03 PM
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#8
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Georgia Rally Coordinator
Join Date: Jun 2015
Location: GA
Posts: 24,474
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Quote:
Originally Posted by D_B Travelers
Balanced, yes. And if you decide to have a tire shop do the change out make sure their guys don't come rolling out a shop jack and put it under your axles. If I hadn't been standing where I could see them they would have bent my axles, even after I told them not to jack on the axle.
Do you have a TrailerAid? If not they are something you should have in your WJ as they allow you to lift one tire at a time without any jack at all. Great investment.
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I actually use two short 2x6 boards for that.
Later RJD
__________________
2020 Shasta Phoenix SPF 27RKSS (sold)
2018 Dodge Ram 2500 6.4 3:73 gearing.(sold) (sold) 2015 Chevy 2500 6.0, 4:10
Traded 2015 30WRLIKS V-Lite
Days camped 2019 62
Days camped 2020 49 days camped 2021-74 2022-40 days 2023 5 days
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04-11-2016, 01:48 PM
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#9
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Senior Member
Join Date: Oct 2014
Location: Full timer,,,at Lake Georgetown in central Texas for the winter.
Posts: 442
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Candace123....We also have a 3029W and I upgraded to D's also. I would take the rig to a tire shop,,,,,it'd be a lot less headache.....and yes,,,,DEFINITELY get them spin balanced. I once had a salesman tell me that it wasn't necessary. Bull! A tire is a tire is a tire. An unbalanced tire cost me $5153 when it disintegrated in Ft Worth. Spend the money and don't let anybody tell you that you don't need balancing. Also I highly recommend a tire pressure/temperature monitoring system. If I had one at the time, I'd probably still have the $5153 in my bank account.
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04-11-2016, 01:51 PM
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#10
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Senior Member
Join Date: May 2015
Location: Minnesota, St. Paul suburb
Posts: 335
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Always lift the frame just beyond the spring shackle mount. I use a 10 ton floor jack and to take weight off the tires and then enough to get the tire off. I always have the truck connected and the landing gear down with some pressure off the truck to make sure the trailer won't move. May sound like over kill but safety, safety is always first. Just in case you're not aware don't try to use the rear stablilzer to lift the trailer. They are to stabilize the trailer not lift it off the ground.
BTW: If you try to jack under the axle you can actually crush it and then you'll be replacing that as well as the tires before you can move the trailer anywhere.
__________________
2018 Cedar Creek Silverback 29IK
18 Silverado 3500 HD Dually 6.6 Duramax 4X4
Ultimate Aluminum 5th Wheel Hitch, TST tire monitors w/repeater
Semi-Retired February 3, 2014
Bob & Cindy
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04-11-2016, 01:56 PM
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#11
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Senior Member
Join Date: May 2015
Location: Minnesota, St. Paul suburb
Posts: 335
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Quote:
Originally Posted by Grampa Jim
Candace123....We also have a 3029W and I upgraded to D's also. I would take the rig to a tire shop,,,,,it'd be a lot less headache.....and yes,,,,DEFINITELY get them spin balanced. I once had a salesman tell me that it wasn't necessary. Bull! A tire is a tire is a tire. An unbalanced tire cost me $5153 when it disintegrated in Ft Worth. Spend the money and don't let anybody tell you that you don't need balancing. Also I highly recommend a tire pressure/temperature monitoring system. If I had one at the time, I'd probably still have the $5153 in my bank account.
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If you get the TPS system make sure you get metal stems on the tires. Don't get the rubber ones that flex.
__________________
2018 Cedar Creek Silverback 29IK
18 Silverado 3500 HD Dually 6.6 Duramax 4X4
Ultimate Aluminum 5th Wheel Hitch, TST tire monitors w/repeater
Semi-Retired February 3, 2014
Bob & Cindy
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04-11-2016, 02:11 PM
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#12
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Senior Member
Join Date: Oct 2014
Location: Full timer,,,at Lake Georgetown in central Texas for the winter.
Posts: 442
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I'm sorry,,,,I forgot to mention the metal stems. Yup,,,,pretty important with the change from 50 to 80 PSI.
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04-11-2016, 04:54 PM
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#13
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Junior Member
Join Date: Feb 2015
Posts: 16
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So when we install 80 psi, load range D tires on our lighter weight tt, replacing the 50 psi load range c tires, which the factory deemed appropriate for that specific lighter tt the road shock transferred onto the tt and it's contents will be greater.
Is this a concern?
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04-11-2016, 05:12 PM
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#14
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Senior Member
Join Date: May 2015
Location: Minnesota, St. Paul suburb
Posts: 335
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Not sure. I asked the same thing quite awhile ago on a different forum and no one knew for sure. Lots of thoughts but no real conclusions. One that seemed like it was possible was there would be more suspension movement (hence more suspension wear) but not actually transferred to the trailer frame any more than regular pressure tires. Please remember this is just another members information not confirmed manufacturer facts.
__________________
2018 Cedar Creek Silverback 29IK
18 Silverado 3500 HD Dually 6.6 Duramax 4X4
Ultimate Aluminum 5th Wheel Hitch, TST tire monitors w/repeater
Semi-Retired February 3, 2014
Bob & Cindy
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04-11-2016, 05:33 PM
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#15
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Senior Member
Join Date: Jul 2013
Posts: 1,839
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Quote:
Originally Posted by montgomg
So when we install 80 psi, load range D tires on our lighter weight tt, replacing the 50 psi load range c tires, which the factory deemed appropriate for that specific lighter tt the road shock transferred onto the tt and it's contents will be greater.
Is this a concern?
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LRD tires only require 65 PSI for maximum load capacity.
__________________
A Trailer Tire Poster
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04-11-2016, 06:42 PM
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#16
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Senior Member
Join Date: Mar 2014
Location: Watauga, Texas
Posts: 697
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I also changed my Load rated C tires on my Windjammer to Load D tires. The C's were 50 PSI and the D's are rated at 65 PSI. I figured I should air them up to the rated pressure, but the trailer rides very rough inside now; cabinets are shaken and contents are turned over because of the stiffer ride. I have been doing some research on this issue and found the Goodyear site to have some good information. Goodyear RV Tires – Performance, Durability and Comfort Click "Tire inflation and Loading" bottom left, then click "Download Load Inflation Table". My trailer weighs in about 7800# when we are ready to camp so that means less than 2,000# per wheel. At this weight I see in Goodyear's chart for the ST225/75R15 that I can run with 55# of air in our tires and handle up to 2270# of weight. I am going to try it on this weekend's trip and monitor the pressures and temps to see if it rides better.
This is as good of place as any to look for answers about running less than maximum pressure on higher load rated tires. It also suggests you call Goodyear to ask any other questions.
__________________
D_B Travelers - 39 nights in 2018, 58 nights in 2017. [U]1st love: 2014 TT WJ3001w, now 2016 40' FW SOB, 2015 GMC 3500HD CC DRW Duramax, TST 507rv TPMS.
"Happiness? A good meal, a good cigar and a good woman - or a bad woman; it depends on how much happiness you can handle."
George Burns (1896 – 1996)
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04-11-2016, 07:38 PM
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#17
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Senior Member
Join Date: Oct 2014
Location: Full timer,,,at Lake Georgetown in central Texas for the winter.
Posts: 442
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DB,,,,,just watch them closely, because as you know.....an underinflated tire can ruin your day.
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04-11-2016, 07:49 PM
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#18
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Senior Member
Join Date: Mar 2014
Location: Watauga, Texas
Posts: 697
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Yes, I run a TST 507 religiously.
__________________
D_B Travelers - 39 nights in 2018, 58 nights in 2017. [U]1st love: 2014 TT WJ3001w, now 2016 40' FW SOB, 2015 GMC 3500HD CC DRW Duramax, TST 507rv TPMS.
"Happiness? A good meal, a good cigar and a good woman - or a bad woman; it depends on how much happiness you can handle."
George Burns (1896 – 1996)
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04-11-2016, 07:49 PM
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#19
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Senior Member
Join Date: May 2015
Location: Minnesota, St. Paul suburb
Posts: 335
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Quote:
Originally Posted by D_B Travelers
I also changed my Load rated C tires on my Windjammer to Load D tires. The C's were 50 PSI and the D's are rated at 65 PSI. I figured I should air them up to the rated pressure, but the trailer rides very rough inside now; cabinets are shaken and contents are turned over because of the stiffer ride. I have been doing some research on this issue and found the Goodyear site to have some good information. Goodyear RV Tires – Performance, Durability and Comfort Click "Tire inflation and Loading" bottom left, then click "Download Load Inflation Table". My trailer weighs in about 7800# when we are ready to camp so that means less than 2,000# per wheel. At this weight I see in Goodyear's chart for the ST225/75R15 that I can run with 55# of air in our tires and handle up to 2270# of weight. I am going to try it on this weekend's trip and monitor the pressures and temps to see if it rides better.
This is as good of place as any to look for answers about running less than maximum pressure on higher load rated tires. It also suggests you call Goodyear to ask any other questions.
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Alright finally a confirmed answer to harder ride beyond what I had before so my previous post has been answered. It appears that the key is to adjust tire pressure to actual trailer weight. This means to add scaling to checklist before departing so correct tire pressure can be set.
Now I need to find the correct inflation charts for the tires I have and the ones I want to buy (Maxxis 8008 or Carlisle both LDE, 10 ply tires). I'm pretty sure and really assuming there are specific charts for each tire. I hope this isn't opening a can of worms.
__________________
2018 Cedar Creek Silverback 29IK
18 Silverado 3500 HD Dually 6.6 Duramax 4X4
Ultimate Aluminum 5th Wheel Hitch, TST tire monitors w/repeater
Semi-Retired February 3, 2014
Bob & Cindy
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04-11-2016, 08:01 PM
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#20
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Mod free 5er
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,702
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IF, it has torsion axles, you MUST jack between the axles.
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