I hate to admit defeat..
Spent a good hour trying to inflate two new 4:00 x 6 " lawn cart or wheelbarrow type tires on my neighbors cart today...with zero success..
These tires came from Walmart--first they told her the ones I had looked up online for her that were $7.77 each on clearance "doesn't show up" when she went to place the order and pay for them..they did find two others the same size,that ended up costing over $25 for the pair & shipping..
What a farce..these tires are stiff as heck and looked like they were left in a hydraulic press for 10 years..you can barely pull the beads apart,and they return to the flattened position instantly..
I tried putting the tires out in the sun with some 8" tubes I had ,inflated,in hopes they would expand the tires back into a normal position...
No dice..after 1/2 hour the tires were hot enough to be uncomfortable to touch but they were still stiff and flat as flapjacks..
I've dealt with tires all my life and darn few defeated me,I know a lot of tricks to get the beads to seat on skinny tires when you put them on wide rims--I tried every trick I know,and none worked..the tread area of these tires come to a point they were flattened so bad,and its like they compressed them while still hot out of the mold,then they cooled that way "permanently"..
So you cant use a tire belt on the tread to help spread the beads open..
The beads on these tires dont look too good either,they had a few hunks of rubber that came off exposing the cords in a few spots..the rims have no "safety bead" like a car tire either,and I don't know how the original tires ever held air,they should have leaked around the bead area..
I had suggested to the neighbor she should have just bought tubes for the old tires--but they were cracking badly and tubes probably wouldn't have lasted long in them..but she uses her lawn tractor cart maybe once a year,they would have lived probably..
I even considered stuffing the tires full of the styrofoam shipping pellets in the box to "expand" them and just leave them in the tire,they wouldn't harm anything..but my neighbor was not too keen on that idea..
She took them home,said she will try taking them to a tire shop and see if they can inflate them..I don't know if their "bead blaster" device will work on such small rims...if they tell her they cant (or wont) do that,she's going to have to return the tires,after waiting almost a week for them to come in..
I wish now I had talked her into going to Harbor Freight--they have tires "close enough" on rims,for $8.99 each,but I wasn't sure if the hubs on those would have the right diameter for the axle or be too wide at the hubs for the axle to poke thru..her old rims are in excellent condition and have grease fittings ,and replacing them "for nothing" if the HF rims fit didn't seem a good idea either..
Anyone fought this battle with squashed tires and won-?--how did you succeed if you did,I'd like to know..