A tool is provided for assistance in removing tires from wheel rims. The tool has a rim engaging member with a lateral opening for engaging the flange of a wheel rim, and a tire engaging member movably coupled to the rim engaging member. The rim engaging member has a slot, within which a pin of the tire engaging member can slide to thereby allow the tire engaging member to rotate and translate relative to the rim engaging member. A roller is mounted on one end of the tire engaging member to exert a downward pressure on the tire sidewall, and a handle protrudes on an opposite end. A resilient roller is mounted on a lip portion of the rim engaging member to facilitate engagement between the member and the rim, and to prevent damage to the rim. The rim engaging member also may have a resilient roller for engaging a portion of the tire engaging member to enable smooth movement of the two pieces with respect to each other. The tool also has an adjustable tire bead hook member for supporting an upper tire bead while the tool is being used to remove the lower tire bead. This adjustable hook member can be adjusted to fit a variety of tire widths, including double-width tires.