Stage 4 the A.P. reports:
What happens when you have a major mechanical? Where does neutral support come in? Is it limited to a change of wheels or can the rider get a bike? Was it just that the pursuers were only a few seconds behind so any mechanical problems would cost a victory at that critical point?Mexican Julio Perez Cuapio was stopped by a broken chain about 2 1/2 miles from the finish as he was heading toward a possible solo victory. The Mexican cyclist threw his bike away in anger and stood helpless along the road as he was passed by the pursuers.