Abstract: A fully portable device for breaking the bead of a rubber tire from a wheel rim comprises an adjustable closeable loop strap mechanism, adapted to loop around a section of the wheel and tire, in a plane generally radial from the center of the wheel. The device includes a power screw link that is positioned directly over a portion of the tire sidewall, such that a foot on a power screw threaded into and through the link can engage the tire sidewall adjacent the rim. With the loop strap mechanism tightened down around the wheel and tire, turning the power screw urges the tire sidewall inwardly to pull the bead away from the wheel rim.An urging tool is also provided for insertion into the gap between the rim and the bead to pry or otherwise leverage the bead up and over the annular safety flange of "safety rim" type cycle wheels.