Rear inside tire wear. Bent axel?

[Frznrth]

Hi
I have a 4 year old 30' bullet. I noticed that the inside of both rear tires are completely worn out - a bit on the outsides too but not nearly as bad. The fronts are wearing fine fand only maybe 1/3 gone. I read this can be from a bent axel. I do see a wow in the axle but have also been told that some bend is normal. True?? I don't remember doing anything that would have bent an axle. Replace the axle?

Am I good to replace the tears with new ones or do the fronts need to match?

Thanks for the time.

[Still_Searchin_]

Just running up and over a 4" curb in a parking lot can bend an axle. I had inside wear on my dual axle Jayco, and even though I had not exceeded my GAWR, one of the posts here recomended getting heavier 5000# axles rather than keeping the original 3500# axles, which I did, and sure enough, inside wear went away. Checking alignment is also a good idea.