According to
The Australian:
But the Evans of 2011 is made of sterner stuff.
While he was given some assistance from BMC team mates Marcus Burghardt, then George Hincapie, he soon found himself isolated again, after having earlier been forced to step off the bike he started with, not once, but twice, before he finally discarding the bike for a reserve machine.
A gear cable attached to his rear derailleur, a spring-loaded device for shifting his chain between cogs or chainrings, was found to be culprit that had threaten to derail his hopes.
Rumor has it that the mechanic has forgotten to recharge the battery.