Tires CK20 Front Tire Issue

[Striker3636]

Looking for suggestions. I have Ag tires on my CK20 with Carlisles on the front. Im having problems with the lift capacity of my tractor probably being more than the little front tires can handle. I have them inflated a few psi over what the sidewall says but still when carrying a heavy load the tires compress too much and seem to stress out the sidewalls too much, sometimes causing flats by pinched tubes etc.
Cant seem to find a higher weight rated tire or a solid or anything like that. Anyone else have the problem, or found a solution?