Moffett trailer tires

I pull a 48 ft transcraft flatbed with a Moffett forklift. Its just about 2 years old and i am looking at replacing the tires soon.

I have 2 newer tires on the front axle that are a little better than the rest (the other 6 are original) so i may leave them on and get 2 used tires to match them for one axle, then get 4 virgins for the other axle.

which axle should get the virgins? Does it matter? Given that i have 8000 lbs hanging off my bumper all the time, I am assuming the back axle usually carries more weight.

 

No, I guess I don't actually know that for a fact, i am just assuming because it sure seems like it does.

Maybe I am wrong?

 

Nope, air ride