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Spindle Failure — Thin-Wall Tubular Steel

From http://www.bicycles.net.au/forums/viewtopic.php?f=34&t=40469 as of 2013/08.

Shimano Dura-Ace 7900

Usage history unknown.

Failed while riding about 45 kph; rider crashed. Injuries: "rib fractures with a pneumothorax, shoulder rotator cuff injury, multiple abrasions. night in hospital."

Service history unknown.

Poster believes bottom bracket bearings siezed, and that the crank slipping on inner bearing race damaged the spindle leading to the failure.

Note brownish-color grease or other goo on the left arm's bearing. Note also the failure was near the race, but not obviously at the race.