Dismounting old tires is more difficult but certainly possible at home.
For 22.5 tires most tire shops use a bead hammer and two Ken Tool T45 tire irons.
They make it look easy, and it is with experience. I have the tools but it wears me out every time I dismount one, I lack experience.
Mounting them is however much easier and very possible to do with good results without a lot of practice.
Still need or will benefit from those T45 bars. T45HD is the model I got, any of them you might want to file and sand and otherwise do a better job finishing the ends to help not scratch new paint.
Lay down some heavy cardboard, a rubber mat, or moving blanket to work on. Use enough tire soap to lube the bead and rim, I used Frey lube last time (and will continue to), Murphy’s oil soap brand tire lube before that.
The best tip for not scratching paint is strips about 3” wide and 5 or 6” long from an oil or antifreeze jug to always pad between tire iron and rim. Might take two people, one to place and later catch the plastic protectors.
Installing the first tire bead on rim usually needs no tools, kind of throw it on at the right angle and it jumps on. Use tire irons for second side.
