Harm Ottenbros was a Dutch road bicycle racer who raced as a professional from 1967 to 1976. His sporting career began with DTS Zaandam. Ottenbros is best remembered for capturing the gold medal and rainbow jersey at the 1969 world cycling championship road race in Zolder, Belgium. The relatively unknown Ottenbros edged Julien Stevens of Belgium by a few centimetres to take the victory.

The UCI Road World Championships Elite Men's Road Race is a one-day event for professional cyclists that takes place annually. The winner is considered the World Cycling Champion and earns the right to wear the Rainbow Jersey for a full year in road race or stage events. The event is a single 'mass start' road race with the winner being the first across the line at the completion of the full race distance. The road race is contested by riders organized by national cycling teams as opposed to commercially sponsored or trade teams, which is the standard in professional cycling.