Load Range G Tires

[CoMoCo]

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.

[blofgren]

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.

[CoMoCo]

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.

[fj12ryder]

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.

[ependydad]

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.

[MFL]

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

Jerry

[Bipeflier]

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.

[B_O__Plenty]

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

[jdc1]

I'll bet it's a typo error.