[od jhon deer]

u said u was having trouble with tires holding up the weight if they r air filled put more air in them if u thank the tubes wont hole and start leaking braze the middle of the 2 rim halfs together r u can try that spray foam in a can u get at hardware stores for sealing cracks in the house spray it in let it set up trim off excess put rims back together that stuff sets up pretty hard at least ways that is just a suggestion if u don't want to use air but those tires with air should hold just fine with more in them I have some like them and I have a 3 hundred lb toll chest on there no problem just a thought