Shimano says 760,000 11-speed Hollowtech road cranksets will need to be inspected for signs of delamination. The affected cranks — Dura-Ace and Ultegra models manufactured prior to July 2019 — can separate and break; the company has received reports of 4,519 incidents of cranksets separating, and six reported injuries, including bone fractures, joint displacement and lacerations.The cranks were sold by dealers as aftermarket and OE components from January 2012 through August 2023 for between $270 and $1,500.