David "Tinker" Juarez (born March 4, 1961) is an American former professional BMX and cross-country mountain bike racer. His prime competitive years in BMX were from 1978 to 1984 and in mountain bike racing from 1986 to 2005. Since late 2005, he has competed as a Marathon mountain bike racer. In all three disciplines, he has won numerous national and international competitions. Most recently, Juarez finished third in the 2006 Race Across America Endurance bicycle race.

Born in Downey, California, Tinker Juarez is a cyclist who has made significant impacts in the cycling disciplines of BMX Racing, Freestyle BMX, Cross-country Mountain Bike racing, and now Marathon Mountain Bike racing for over thirty years.