[Dlawhun]

Just back from a weekend RV trip w/ my 2018 Keystone Hideout TT--dual axle. Had--or just noticed--a blowout on my left rear right before arrival at my destination. Right front had also contracted a nail so had it patched before it blew--I questioned the location of the nail to which he sd he patched it while "others" would have replaced the tire due to proximity to sidewall. Then, on the way home my right rear blew. Took an inventory of my four in-service + spare tires & wondering if perhaps I've got multiple potential issues between LR, age & mfr. based on what I'm reading in some o' these posts. Following is my current inventory incl BOD (Born on Date), & psi (Max) for my five ST205/75/R14...

LF: Karrier (OE Brand?)
BOD: 0621
LR C
60 psi


LR: Gladiator
BOD: 1221
LR D
65 psi


RF: Primewell
BOD: 2221
LR C
50 psi


RR: Karrier (OE Brand?)
BOD: 3317
LR C
60 psi


Spare: Hartland
BOD: 1622
LR C
50 psi

What needs "fixing"? . . . or just scrap them all & go w/ all new Brand x?