[goodellj]

I am far from expert on tires, but I can tell you all about my experiences struggling with the OEM "E" rated tires that were on our 2012 3150RL 5th wheel. I got a few flats so I got a Tire Pressure Monitoring system and a Viair RV Tire Inflator and started really babying my tires. I bought new tires 6 at a time, carried the extra 2 unmounted, AND USED THEM ALL TWICE over 2 years! Usually I would find a bulge or slow leak before I had a road breakdown.

I kept asking tire salesmen and techs how I could do a better job with the tires, and finally FOUR YEARS AGO one of them suggested moving up to G rated. Problem solved. I haven't had a flat since. He said my rims could handle the G rated tires even though they have a radius 1/2" larger than the E rated tires.

BTW, it appears that all the new Montanas come with G rated tires now.