Before I bought a No Mar, I made a simple bead breaker that works great and inexpensive too,
Used about a four foot 2x4 ("handle") hinged to the wall using a strap hinge, and about 10" back off the wall another hinged 2x4 ( "breaker") with a tapered end that is long enough to be about a foot off the floor when the top 2x4 "handle" is parallel to the floor.
I thru bolted both strap hinges through the lumber and used lags into the wall stud.
It folds to the wall when not in use.
I used three 4x4 pieces to set the wheel on the concrete, break the bead, when bent over rest the handle on your back, rotate tire, repeat, etc.
I always, always make sure both the old and new tires are warm, and use lots of lube.
09 DL650 Silver