The specific models affected are the 11-speed compatible Ultegra FC-6800, Dura-Ace FC-9000, Ultegra FC-R8000 and Dura-Ace FC-R9100 chainsets, as well as the FC-R9100P power meter variant.

It affects products manufactured prior to 2019, with one of the following two-letter production codes on the rear of the crank arm:
KF, KG, KH, KI, KJ, KK, KL, LA, LB, LC, LD, LE, LF, LG, LH, LI, LJ, LK, LL, MA, MB, MC, MD, ME, MF, MG, MH, MI, MJ, MK, ML, NA, NB, NC, ND, NE, NF, NG, NH, NI, NJ, NK, NL, OA, OB, OC, OD, OE, OF, OG, OH, OI, OJ, OK, OL, PA, PB, PC, PD, PE, PF, PG, PH, PI, PJ, PK, PL, QA, QB, QC, QD, QE, QF, QG, QH, QI, QJ, QK, QL, RA, RB, RC, RD, RE, and RF.


The affected parts are 680,000 units sold in North America, and 80,000 further units sold in Canada over the eleven-and-a-half-year period between January 2012 through August 2023. Cyclingnews understands this only relates to the products that fall under the CPSC's jurisdiction, and that the number could be much higher when extrapolated worldwide.

According to the CPSC, the recalled bonded components can separate and break, posing a crash hazard to consumers. It reports that Shimano has received 4,519 incidents of cranksets failing through separation of the bonded construction. From these, there have been six reported injuries including bone fractures, joint displacement and lacerations. It is unconfirmed over what time period the incidents were recorded.

Despite their similar appearance, Shimano's 105 chainsets are not affected by the recall, due to a cold-forged manufacturing process. Likewise, no 10-speed or 12-speed components are affected either.

If your crankset passes the inspection and has no signs of delamination, we appreciate your patience and diligence in having the safety inspection done. You may continue using your crankset as normalIf your crankset passes the inspection and has no signs of delamination, we appreciate your patience and diligence in having the safety inspection done. You may continue using your crankset as normal