Forum Discussion

CoMoCo's avatar
CoMoCo
Explorer
Feb 13, 2020

Load Range G Tires

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.