Okay...I'm over myself now.
When I've broken beads, I'd always use the hammer thing.
I put the head of the hammer up at my shounder/chest pocket where a rifle stock would go. Wheel on ground. Holding handle with both hands, butt of handle on tire near bead, I do a bayonet thrusting move driving with my shoulder, using all my weight and muscle complete with a grunt and maybe a "KILL". Has always worked. Should work for most since I reckon it's a violent move and packs some punch.
But I weigh like 195 lbs and used to pick up heavy stuff as a sport. Or I've been lucky. Or both.