Shimano has launched a voluntary inspection and replacement program for some bonded 11-speed HOLLOWTECH II road cranksets produced before July 2019 for a possible bonding separation issue. 

If your crankset has one of these applicable model numbers, please identify the production code stamped on your crank arm.

A production code is stamped on the inside of the crank arm near the bottom of the arm. The affected models are pre-July 2019 production and have one of the following two-letter production codes on back side of the crank arm where the pedals are attached: 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.

If your crankset has one of these production codes, we will inspect your crankset without charge, and if your crankset shows bonding separation, you will be provided with a free replacement crankset.