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Old 05-07-2013, 06:24 AM   #1
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Load range decision F or G

looking at tires for the motorhome, finding large price difference based on load range. For example the difference in load range F and G on Goodyear 670, $150 more for the G than the F.

Looking at the inflation charts, my f-53 22,000 lbs chassis would probably be fine on F's. Conventional wisdom would say the G is probably "better built", i.e. stronger. May result in harsher ride due to harder sidewall too. Not sure there would be any benefit to the higher load range for my purposes. There is a big difference I see immediately...$900 on full set.

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Old 05-07-2013, 06:41 AM   #2
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Tom, there should be a tire size and pressure decal inside the mh somewhere. Can be on the inside of a cupboard door or on the wall beside or near the drivers seat. On that decal it will specify the load range and tire size for your model motorhome. I would highly and I mean highly recommend only using the specified load range for your motorhome. Going to a lesser load range than specified to save a few bucks is NOT a smart move.
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Old 05-07-2013, 06:48 AM   #3
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Quote:
Originally Posted by Mike Canter View Post
Tom, there should be a tire size and pressure decal inside the mh somewhere. Can be on the inside of a cupboard door or on the wall beside or near the drivers seat. On that decal it will specify the load range and tire size for your model motorhome. I would highly and I mean highly recommend only using the specified load range for your motorhome. Going to a lesser load range than specified to save a few bucks is NOT a smart move.
Will look for that and see, but I would not try to cut corners by going to a lower load rated tire to save money. Guess my point is I get price quotes based on tire size, no one has yet to ask about load range. This came up when shopping online to get some price points to shop with. Never knew there was such a difference. Now, assuming my coach calls for F, would there be any SIGNIFICANT value to G's to justify the price difference?
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Old 05-07-2013, 06:58 AM   #4
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"higher load range" usually means more stability because there is less tire squirm; it also means a harsher ride as mentioned. I would not select a tire that will be loaded to 80% of its capacity or more.
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Old 05-07-2013, 07:19 AM   #5
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Tom, read through the attached manual and look at the charts that specify how much each load range can carry per tire at the recommended inflation pressures. I am not sure that I agree that using the correct load range would be a harsher ride because the logic is that suspension is designed for that specified load range. Ray is correct that the is a percentage of load that a tire is designed to run at and you sure would not want to have it in the 90-100% area.
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File Type: pdf RVTiresBrochure.pdf (1.98 MB, 33 views)
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Old 05-07-2013, 03:01 PM   #6
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Tom, read through the attached manual and look at the charts that specify how much each load range can carry per tire at the recommended inflation pressures. I am not sure that I agree that using the correct load range would be a harsher ride because the logic is that suspension is designed for that specified load range. Ray is correct that the is a percentage of load that a tire is designed to run at and you sure would not want to have it in the 90-100% area.
OK here we go, my coach calls for "F" range tires on the sticker. No mention of the 80-90% rule in that brochure. So, I have axle weights, but not corners, my front axle loaded to go on road, 6,350, and rear 12,560, Goodyear inflation chart show "F" rated tires max rating is 4,080 single (X2) or 8,160 for front, and 3,970 dual (X4) for 15,880 for rear. Using the 90% rule I am fine, 90% of these amounts being 7,344 front and 14,292 rear, I am well within those. Even using prior poster's 80% rule I am safe, 80% being 6,528 front and 12,740 rear.

SO......Guess I am shopping for "F" rated 245/70R19.5 tires, the wallet will be happy too!
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Old 05-07-2013, 03:58 PM   #7
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I spoke with my manufacturer prior to buying my XRV 245 70 R 19.5 Load Range F tires.

I was told that is the load range the coach should have on it. Yes, you can buy higher load range, but you should never be exceeding the load range issued by the manufacturer, so why buy the harder riding G or H tires, especially if they are more expensive?

If they were cheaper, it might be worth considering, which I found a lot more Load Range G and H tires (24570R19.5) that were cheaper than the LR F tires when I was looking. I am very happy I stayed with the LR F and that I bought the XRV tires designed specifically for RV's with UV resistance, something truck tires do not have.
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Old 05-08-2013, 05:56 AM   #8
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I was very surprised at the difference in price on the Goodyears between F and G, more than $100 a piece. Now as I shop I will have to ask about load range, as I called around for prices NO ONE ever asked what load range I was looking for, or told me the load range they were quoting. Nice to be informed.
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