At about 1115 Pacific time, a Cessna T210M suffered a landing gear failure and departed the runway at Nevada County Air Park. The pilot and two passengers were not injured; a third passenger suffered minor injuries. The pilot reported touching down normally and hearing a metallic clank when the right main gear touched down. He immediately pulled back on the yoke and the airplane briefly became airborne again, then he let the airplane settle back to the runway. At that point, the airplane departed the runway to the right. Broken wheel components were found on the runway.