Good Sam Club Open Roads Forum: Fifth-Wheels: Load Range G Tires
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CoMoCo

Oakville, ON, Canada

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Posted: 02/13/20 08:45am Link  |  Quote  |  Print  |  Notify Moderator

I currently have Goodyear G614 tires on our fifth wheel (see signature). This is what came on the trailer when we bought it new in 2013. I am looking at new tires and am trying to understand why the G614 tires (235/85R16) have a diameter of 30.7 inches whereas all other 235/85R16 tires have a diameter of 31.7 inches.

If I switch tire brands I don't know if a 1 inch larger tire will fit in my wheel wells.

Does anyone know why the Goodyear G614 tires have a smaller diameter than every other tire brand? Even the Goodyear Endurance 235/85R16 has a diameter of 31.7 inches. (I have no intention of dropping to an E range tire - the Endurance is just an example).

Thanks for any input.


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jdc1

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Posted: 02/13/20 08:59am Link  |  Quote  |  Print  |  Notify Moderator

I'll bet it's a typo error.

B.O. Plenty

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Posted: 02/13/20 09:01am Link  |  Quote  |  Print  |  Notify Moderator

One inch more in diameter if that is correct, will only be 1/2" taller. Not a concern at all.
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Bipeflier

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Posted: 02/13/20 09:04am Link  |  Quote  |  Print  |  Notify Moderator

I just ran out and quickly (it is 6 degrees F) measured mine. They are slightly less than 31". I replaced my China Bombs with the G614s and really didn't notice any difference in the stance or clearance in the wheel wells. I'm betting anything will fit in yours.


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MFL

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Posted: 02/13/20 09:07am Link  |  Quote  |  Print  |  Notify Moderator

Most cases 3"s of clearance will work. I would not go to only 2"s, or less though.

Jerry





ependydad

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Posted: 02/13/20 09:42am Link  |  Quote  |  Print  |  Notify Moderator

You likely have less of an issue above the tire as you may have issues between the 2 tires on each axle.

On my old camper, I had less than 2" of space between the tires. When I wanted to upgrade them, I had to be very particular about what I replaced them with because I couldn't afford any kind of outer diameter change.

And yes, I saw a good 1" deviation on load range E tires.


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fj12ryder

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Posted: 02/13/20 10:38am Link  |  Quote  |  Print  |  Notify Moderator

If trailer tires are anything like motorcycle tires, there will be a size variance between manufacturers, with the same tire size.

But if you are considering Sailun tires, they come in a 235/80-16,which is, I believe, the same size as the Goodyear, as well as the 235/85-16.


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CoMoCo

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Posted: 02/13/20 12:55pm Link  |  Quote  |  Print  |  Notify Moderator

Thanks for the replies. I think the size is right - GoodYear has been publishing the same diameter for at last 8 years. Doesn't mean it's right though.

The Sailun 235/80-16 is an option I am considering.

blofgren

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Posted: 02/13/20 07:41pm Link  |  Quote  |  Print  |  Notify Moderator

CoMoCo wrote:

Thanks for the replies. I think the size is right - GoodYear has been publishing the same diameter for at last 8 years. Doesn't mean it's right though.

The Sailun 235/80-16 is an option I am considering.


My Sailun S637's are going on 5 years old, still look like new, and only lose 2-3 psi each even when sitting for 6 months over the winter. I would go with them again without hesitation, and they were close to half the price of the Goodyears.


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Cummins12V98

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Posted: 02/14/20 09:26am Link  |  Quote  |  Print  |  Notify Moderator

CoMoCo wrote:

Thanks for the replies. I think the size is right - GoodYear has been publishing the same diameter for at last 8 years. Doesn't mean it's right though.

The Sailun 235/80-16 is an option I am considering.


Curious have the GY's given you any problems?

If not then I guess it's down to $$$ and either US or Chinese Made.


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