rgrigutis
I fit and balance my own bike tyres, tubed and tubeless, and balance them on the bike itself with callipers and outer spacers left off so the wheels spin freely.
Essential tools are a proper bead breaker, long smooth tyre levers, white liquid hand soap and paint brush, a tyre pump( I use a 12v electric type) and a good selection of flat self adhesive tyre weights, usually 5 - 10g.
Even with these aids it,s still a chore I dread every three or so years but nothing beats a set of well balanced new tyres you,ve fitted yourself. I fit them flat on the lawn.
Scrub the tyres in gradually as you lean over although new Conti radials have a special surface finish that no longer needs this.
Remove as per chris plant and others advice and clean or wire brush the rim if alloy, I also use high temp adhesive tape over the spoke nipples to give a semi tubeless function which has helped me get home once using a car sized can of tyre seal which lasted the 100 plus mile ride (leaving the offending screw in place)
Around 40-45 psi and plenty of soap may be needed to pop the tyre out onto the rim if it gets held up on the inner edge but this is more likely on wider alloy rims.
Balance each wheel complete with discs and sprocket on it,s own axle and centre it so nothing touches, front wheel must be straight up.
Then spin and settle each wheel individually with the heaviest point at the bottom, progressively adding weights, split equally either side of the spokes as per old school until it will settle at any point.