What are your axle ratings? If you don't have this information what is the gross vehicle weight rating (GVWR)? Take that value and divide by 5 (Safety factor). Go to the tire store and buy tires with at least the above load rating in pounds. Forget about LRE, LRF, etc. Go by the weight rating.
Fran, Mary & Zoey (silver Cocker)
2006 Itasca Sunrise 35A, 2005 W-22, Allison 1000 5 speed
'13 Ford Focus ST or '10 Prius on Master Tow Dolly 80THD-SB or '00 Jeep Cherokee 4-down