Originally Posted by Kenny kustom
I could put 19.5's on my ram, and jump up a fair bit in load capacity with g rated tired.
2016 Sabre 36QBOK
2015 Ram 3500 CUMMINS
Since it is the inflation that carries the load not the tire moving from LR-E two steps to LR-G is where the extra load capacity comes from.
The OP didn't provide his tire size (would be helpful) but I am guessing it is LT235/85R16 LR-E which is rated 3,640# @ 80 psi in single position and is about 31.73 OD.
There are no LT sizes I am aware of in 19.5" but there are Truck tires in that rim diameter with an 8-19.5 LR-F rated at 3,525# at 110 psi but it is 33.82 OD so that can't be it as the load capacity is lower.
What size 19.5 are you thinking about?
I write a blog on RV tire application and safety. RVTireSafety.com
Also give seminars on tires at RV events across the US. 40 years experience as tire design & quality engineer for major tire mfg. Freelander 23QB on Chevy chassis is my RV