In 2005, Joan couldn't find a bike built for her body — so she built one herself. As the founder of ZIZE Bikes, she spent years researching, designing, and engineering bicycles that safely accommodate plus-sized riders, filling a gap the industry had long ignored. That same eye for the overlooked — the spaces, products, and experiences that exclude without meaning to — is what drives this course. Joan knows firsthand what it costs a business to lose a customer they never meant to turn away.