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11-11-2017, 12:15 PM
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#1
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Senior Member
Join Date: Oct 2017
Posts: 1,937
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Tire Rating?
I have read some posts here about tires and load range etc.
But I have a question on single versus dual.
I'm trying to get it into my brain, why, a dual mount tires load range is lower than a single. Seems to me if you have two tires on the same axle it would handle more weight. According to the tire specking, looking for the right word here, it is not. Help me out here. Why does a dual application handle less weight? Or, is that per tire. My steering tires say, Max Load Single, 4540 @ 110 psi. Max Dual Load, 4300 @ 110 psi.
I'm thinking and typing as I go here trying to figure it out. Kind of like forum brain storming.
Here is a link I found on truck tires I thought Interesting.
https://az184419.vo.msecnd.net/schne...dRangeGvsH.pdf
Thank you for your patience.
__________________
Larry & Sheree & KD the CAT
2009 Holiday Rambler Admiral 30SFS Lewis County, Wa.
USN 1964-68, USS LEXINGTON CVS-16
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11-11-2017, 12:23 PM
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#2
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Senior Member
Entegra Owners Club
Join Date: Jan 2001
Location: Cape Cod, MA
Posts: 1,803
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It's the rating of the single tire in that position. The set of dual would be good for 8600 lb.
__________________
Jeanie, Ed & Slade the GSD(RIP)
Cape Cod, MA
2017 Entegra Aspire RBQ & Silverado Crew or GC
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11-11-2017, 12:30 PM
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#3
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Senior Member
Join Date: Oct 2017
Posts: 1,937
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I've been to Cape Cod. Nice place.
Ok got ya on that. But why wouldn't the rating be double the single rating?
__________________
Larry & Sheree & KD the CAT
2009 Holiday Rambler Admiral 30SFS Lewis County, Wa.
USN 1964-68, USS LEXINGTON CVS-16
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11-11-2017, 12:42 PM
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#4
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Senior Member
Join Date: Nov 2008
Location: Cosby, Tn
Posts: 6,587
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Quote:
Originally Posted by edge68474
I've been to Cape Cod. Nice place.
Ok got ya on that. But why wouldn't the rating be double the single rating?
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The idea behind the lower weight rating when in dual service is because of the close proximity of the tires causes a greater heat buildup and retention.
__________________
Steve Ownby
Full time since 2007
2003 Monaco Signature
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11-11-2017, 02:21 PM
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#5
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Senior Member
Join Date: Sep 2009
Posts: 1,536
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Quote:
Originally Posted by Steve Ownby
The idea behind the lower weight rating when in dual service is because of the close proximity of the tires causes a greater heat buildup and retention.
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And road crown.
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11-11-2017, 04:32 PM
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#6
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Senior Member
Join Date: Oct 2017
Posts: 1,937
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Road Crown. I know what that is, but what does that do to the tires?
The only thing I can think of is that it would Lean, like in Lean over, the weight, gravity. My guess. Shrugs shoulders.
__________________
Larry & Sheree & KD the CAT
2009 Holiday Rambler Admiral 30SFS Lewis County, Wa.
USN 1964-68, USS LEXINGTON CVS-16
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11-11-2017, 07:54 PM
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#7
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Senior Member
Join Date: Dec 2013
Location: Lake Havasu City, AZ & Plover, WI
Posts: 6,403
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Road crown is just that, a crown. The crown is curved and has shown that the inner tires of the four on the drive axle sometimes carry more weight than the outer tires. To allow for that and less cooling effect due to being close to another heated tire, tires are derated to prevent overloading and overheating them.
__________________
2006 Monaco Executive 44 Denali
2013 43 QGP Allegro Bus ( SOLD )
2013 Avalanche
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11-12-2017, 04:59 PM
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#8
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Senior Member
Join Date: Nov 2017
Location: Citra, Florida
Posts: 1,396
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Quote:
Originally Posted by edge68474
I have read some posts here about tires and load range etc.
But I have a question on single versus dual.
I'm trying to get it into my brain, why, a dual mount tires load range is lower than a single. Seems to me if you have two tires on the same axle it would handle more weight. According to the tire specking, looking for the right word here, it is not. Help me out here. Why does a dual application handle less weight? Or, is that per tire. My steering tires say, Max Load Single, 4540 @ 110 psi. Max Dual Load, 4300 @ 110 psi.
I'm thinking and typing as I go here trying to figure it out. Kind of like forum brain storming.
Here is a link I found on truck tires I thought Interesting.
https://az184419.vo.msecnd.net/schne...dRangeGvsH.pdf
Thank you for your patience.
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Dual tires do not add much if anything to the weight rating of the rig. First off they add 150lbs or so. What they do is add stability to the MH. If you check the rating of 2500 and 3500 series PU trucks you will see what I am saying. If a person on a ranch or farm uses dirt roads allot he would benefit from a dually. MH's benefit mostly from a smoother ride and more stability when passing our friends the Truckers.
Q
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11-12-2017, 05:13 PM
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#9
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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 Crasher
Road crown is just that, a crown. The crown is curved and has shown that the inner tires of the four on the drive axle sometimes carry more weight than the outer tires. To allow for that and less cooling effect due to being close to another heated tire, tires are derated to prevent overloading and overheating them.
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WA DOT quit building roads with a "crown" (parabolic curve) back in the 1970's. They now use a straight slope measured in .10 per foot of run. Usually use .02' per foot of lane width.
__________________
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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11-12-2017, 05:20 PM
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#10
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Senior Member
Join Date: Nov 2017
Location: Citra, Florida
Posts: 1,396
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Quote:
Originally Posted by edge68474
I have read some posts here about tires and load range etc.
But I have a question on single versus dual.
I'm trying to get it into my brain, why, a dual mount tires load range is lower than a single. Seems to me if you have two tires on the same axle it would handle more weight. According to the tire specking, looking for the right word here, it is not. Help me out here. Why does a dual application handle less weight? Or, is that per tire. My steering tires say, Max Load Single, 4540 @ 110 psi. Max Dual Load, 4300 @ 110 psi.
I'm thinking and typing as I go here trying to figure it out. Kind of like forum brain storming.
Here is a link I found on truck tires I thought Interesting.
https://az184419.vo.msecnd.net/schne...dRangeGvsH.pdf
Thank you for your patience.
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Dual tires do not add much if anything to the weight rating of the rig. First off they add 150lbs or so. What they do is add stability to the MH. If you check the rating of 2500 and 3500 series PU trucks you will see what I am saying. If a person on a ranch or farm uses dirt roads allot he would benefit from a dually. MH's benefit mostly from a smoother ride and more stability when passing our friends the Truckers.
Q
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11-13-2017, 06:50 AM
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#11
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Senior Member
Join Date: Dec 2013
Location: Lake Havasu City, AZ & Plover, WI
Posts: 6,403
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Quote:
Originally Posted by Quincy
Dual tires do not add much if anything to the weight rating of the rig. First off they add 150lbs or so. What they do is add stability to the MH. If you check the rating of 2500 and 3500 series PU trucks you will see what I am saying. If a person on a ranch or farm uses dirt roads allot he would benefit from a dually. MH's benefit mostly from a smoother ride and more stability when passing our friends the Truckers.
Q
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Are you really saying that other than stability, the dual tires on the 22,000# rear axle of my motorhome contribute very little to achieving its rating?? Did I misunderstand your point??
__________________
2006 Monaco Executive 44 Denali
2013 43 QGP Allegro Bus ( SOLD )
2013 Avalanche
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11-13-2017, 07:00 AM
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#12
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Senior Member
Fleetwood Owners Club
Join Date: Jun 2009
Posts: 4,031
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__________________
99 Discovery 34Q ISB
2014 MKS AWD EcoBoost Toad
Fulltime Since "99"
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11-13-2017, 07:11 AM
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#13
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Senior Member
Join Date: Oct 2017
Posts: 1,937
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OK thanks. I think I'm getting this. One other question. Where do I find on my coach, the tag or whatever, the maximum weight, gvw, gvwr etc. where is that bugger?
Thank you.
__________________
Larry & Sheree & KD the CAT
2009 Holiday Rambler Admiral 30SFS Lewis County, Wa.
USN 1964-68, USS LEXINGTON CVS-16
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11-13-2017, 07:18 AM
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#14
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Senior Member
Join Date: Dec 2013
Location: Lake Havasu City, AZ & Plover, WI
Posts: 6,403
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Quote:
Originally Posted by edge68474
OK thanks. I think I'm getting this. One other question. Where do I find on my coach, the tag or whatever, the maximum weight, gvw, gvwr etc. where is that bugger?
Thank you.
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Mine has been in the rear bedroom closet on the last three coaches.
__________________
2006 Monaco Executive 44 Denali
2013 43 QGP Allegro Bus ( SOLD )
2013 Avalanche
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