Just for info I ordered set SAILUN 637 G load tires for friend and this size is almost identical in diameter size of the GOODYEAR 614. 30.7 inches so good option to consider
I've had the G614s for 5 years now and was about to replace them with the S637s. However, just sold camper yesterday and new one came with 614s. I have no problem using the 637s whatsoever. My partner at work has them on her camper(which I recommended) and are great tires. Here in GA we got them for $150.50 each from NTB. When the GYs are in need of replacing on my new one. I will buy the 637s.