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Old 04-23-2014, 09:46 PM   #1
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Load Range Dilemma

Tires: Yup, yet another post, but I do need some help here.

I have a 1997 Rexhall Air 32' Class A MH and am about to pull the trigger on tires.
I have been so concerned about making sure I get the 'right' tires, meaning, ones that have the right load range and capacity.

So just today I FINALLY found a place to weigh the MH and here's what I have:
Actual Weight Sticker Info
Front Axle 4960 6000
Rear Axle 10660 11000
Total 15620 17000

I was concerned that the 235/85R16-E 10 ply load range of 3042 was too close to the limit so instead of I was thinking of getting a G 14 ply rated tire.

But now that I see the actual weight should I stick with the E - 10 ply range?

Here's additional info: The RV had 3/4 tank of gas, full tank of clean water, very little in gray water and me (175 lbs)

And is this how you figure "Reserve Capacity"?

Tire rating for 235/85R16 Load Range E = 3042
So is the reserve load range capacity minus actual weight?

Front Capacity 3042 x 2 6084
Rear Capacity 3042 x 4 12168
Front Axle Weight 4960
Rear Axle Weight 10660
Front Reserve 6084 - 4960 1124 - I can add this much weight to the front
Rear Reserve 12168 - 10660 1508 - and this much to the back

Compare to Hercules H-901 Load Range G = 3756 (3415 Dual..why?)
Front Capacity 3756 x 2 7512
Rear Capacity 3415 x 4 13660
Front Reserve 7512-4960 = 2552 *Much better compared to 1124 lbs
Rear Reserve 13660-10660 = 3000 *Much better compared to 1508 lbs

So, gosh...now that I have actually put it all down on paper it's kind of a 'duh' moment, but here's the price difference:

6 - Cooper A/T3 - 1159.00 Out the door
6 - Hercules H-901 - 1532.00 OTD
Difference 373.00

Worth it?

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Old 04-23-2014, 10:17 PM   #2
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You said it!!!

now that you put it on paper.....seems pretty clear to me. For a few bucks you gain a significant safety margin. If you choose the other option, and then have a blowout, you just lost all your savings, plus some, and maybe endure a hairy ride to the side of the road in the middle of rush hour...

'07 Holiday Rambler Endeavor PRQ ("Elvis"), and our 2012 CRV toad
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Old 04-23-2014, 10:36 PM   #3
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Originally Posted by B52Guy View Post
now that you put it on paper.....seems pretty clear to me. For a few bucks you gain a significant safety margin. If you choose the other option, and then have a blowout, you just lost all your savings, plus some, and maybe endure a hairy ride to the side of the road in the middle of rush hour...
I do agree I would over do
Getting ready to hit the road, But still getting answers. So thanks for the help! 2006 Winnebago Sightseer 29R Ford F53. Roadmaster Eagle 8000. 2001 Ford F150 7700 4x4. Still shopping for toad brakes. FMCA F286179
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Old 04-23-2014, 11:30 PM   #4
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Awesome, thanks for the quick turn around. I also agree.
1997 RexAir 32' Ford F53 Chassis
Spokane, WA
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Old 04-25-2014, 10:56 AM   #5
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Well I did it! Bought the Hercules H-901 (DOM 4813) and watched as my local Tire Store struggled to get these installed. They brought out the BIG jack...and it was broken. So they had to bring out two smaller ones and were able to get the job done, but not without a few hitches. Had to remove the modeling around the edge of the opening in order to get the wheels out. Sigh...now I wished I had gone to an RV place but I KNOW they would have charged me WAY more. But I watched them carefully to make sure they didn't damage anything and I took the opportunity to sneak in and check the breaks (all look good!) so that was worth while.

BUT...I forgot to do one thing....insist on them replacing the rubber valve stems with metal ones...sigh. Can't think of everything. How big a deal is that?

One thing I noticed is there is not an air extender on the outside wheel in the back, only one of the inside wheel. I did mention that to them and they said I would have to buy that from an RV dealer.

So what did I learn?

Maybe next time to research (like I did) and buy on-line, and THEN take it to an honest to goodness RV dealer to have them balanced and put on.

The only RV place I know around here (Spokane, WA) is RNR RV in Liberty Lake and when I called them for a quote on these tires..$500 more!

I am planning on taking the MH their to get it aligned as I don't know anywhere else that can handle a 32 foot rig.

Well, that's ONE thing off my huge list to get the RV ready for travel. Sure hope all this work is worth it! ;-)

Thanks everyone for your help and comments. I love these forums!
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Old 04-25-2014, 12:12 PM   #6
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Good choice on the higher load range tires. That is what I have always done. Keep in mind that you should still not exceed the axle or chassis weight capacity even with the heavier tires. Definitely replace the rubber valve stems with metal. I am surprised that they would even put rubber ones on. The rubber is especially dangerous if you have extenders because they will cause a quick failure.
Palm Springs, CA - 2005 National Tropi Cal 370LX on a Freightliner, Cat 350 power. Towing a Rinker R1 - Lake Havasu Bound!!
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Old 04-25-2014, 04:33 PM   #7
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Look for a heavy duty truck shop that does wheel alignments, also they mount/balance tires and should have the steel valve stems.

Kent and Sally Lunda
1996 Newmar Mountain Aire/Slide 300HP Cummins8.3C
2004 Honda Odyssey (Toad)
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