Big news in the industry as Shimano have announced they will be conducting an inspection and replacement program on a selection of bonded 11-speed HOLLOWTECH II cranksets produced between June 1, 2012 and June 30, 2019. Cranks affected by this issue will need to be inspected by a local Shimano dealer and if necessary, replaced.
Which models are affected?
Do my cranks need inspecting?
A two letter identification code is stamped on the back side of each crank arm, next to the crank length. If your cranks are pre July 2019 and have one of the following manufacturer codes, please contact your local Shimano dealer.
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.
Finding a local dealer
You can use Shimano's locator tool to find your local dealer. Inspections are free of charge
If you have a crank protector fitted, this does not void any warranty issued by Shimano, however we do suggest removing protectors before they are inspected to ensure they do not interfere with the process.
For more information see Shimano's guide HERE