Sarah Walker is a New Zealand professional BMX rider who won the World Championship in 2009 in both the Elite Women and Elite Cruiser Woman's events. She was ranked number one in the world by the UCI in 2008 and was a favorite to win gold at the 2008 Beijing Olympics, where she ultimately won silver. Currently riding for Team NZ, Sarah uses Avanti Bikes and has been a sports ambassador for Beef + Lamb New Zealand since 2008.