Rabobank's Lars Boom spent all bar eight kilometres in the lead of the Amgen Tour of California's 195.5km fourth stage from San Jose to Modesto. The Dutchman was the last of the original four-man breakaway to be caught after he launched a final bid for stage glory with 10km-to-go. He will wear the most agressive riders jersey on stage five, but in this exclusive video Boom reflects on a tough day in the saddle to Modesto.
