Ask a Mechanic: Shimano Di2 Crash Recovery Mode Ask a Mechanic: Shimano Di2 Crash Recovery Mode Greg O'Keeffe2015-12-16T11:59:41-08:00 Earl says, “ I recently had a minor crash and fell on the drive Ask a Mechanic: Shimano Di2 Crash Recovery ModeGreg O'Keeffe2015-12-16T11:59:41-08:00