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Finally! Shimano recalls Dura Ace and Ultegra cranksets
https://www.cyclingnews.com/news/shi...to-crash-risk/
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 |
here, for the clicking-impaired:
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. |
You mean after all this time that we've been told the failures have been statistically insignificant?
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Shoot. Both my road bikes have FC-9000 cranksets, each with a matching Stages power meter. I'll have to check the letter codes when I get home.
I really like the looks of the 9000 and I'm not crazy about the all-black 9200 that it seems they are using as a replacement (cobbled with 11-speed chain rings.) Does anyone know if the crankarm/chainring lines and junction are the same on 9100 as 9200? I am wondering if this blend of 9100 11-speed chain rings on 9200 arms is going to be less than seamless. Also, they say they'll have a shop inspect the crank, leaving open the possibility that they look fine now and pass inspection but break later, which doesn't seem that great. |
Originally Posted by ljsense
(Post 23021867)
Shoot. Both my road bikes have FC-9000 cranksets, each with a matching Stages power meter. I'll have to check the letter codes when I get home.
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Uh oh. I am reading the fine print. Looks like they are borrowing a page from GM:
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 |
Originally Posted by icemilkcoffee
(Post 23021962)
They are only replacing cranksets that are visibly delaminated!
I've seen plates literally bare of readability, all that's left is the embossed aluminum that can't be read. Maybe Shimano's |
I hadn't really paid attention to this issue, but now with the official recall I'm reading up as much as I can -- it seems like corrosion is a major factor in how this failure occurs: water, or worse, salty water gets inside the hollow area and reacts with the bare aluminum, especially where it touches the steel spindle.
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I have the OH designation after the crank arm length on a 6800 crank arm. No signs of separation. This was a mail order purchase from UK (Chain Reaction).
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I stopped at 10sp and it's all Campy, so this does not affect me. But I note that, according to the article, the 105 units are not affected, as they are cold forged. Like my cranks.
Old tech FTW. |
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As far as I confirm (so far) this recall is only for units in USA and Canada? Hmmm. Potentially worldwide recall to follow?
Originally Posted by ljsense
(Post 23021974)
I hadn't really paid attention to this issue, but now with the official recall I'm reading up as much as I can
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This isn't really a recall, as they are only replacing obviously defective units. It's more of a warranty extension.
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I lucked out I guess my fc r8000 numbers are UK and UL.
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"Yup, you are okay .... but don't ride that thing until you are off shop property and on the sidewalk .... Thanks, bye!"
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Originally Posted by trailangel
(Post 23022064)
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Originally Posted by Koyote
(Post 23022236)
This isn't really a recall, as they are only replacing obviously defective units. It's more of a warranty extension.
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Once somebody passes store inspection then fails and gets hurt, only then will become a recall.
Are the retail stores really going to accept this inspection liability for what is a known issue. “It’s a trap” Barry |
Originally Posted by ljsense
(Post 23021867)
Does anyone know if the crankarm/chainring lines and junction are the same on 9100 as 9200? I am wondering if this blend of 9100 11-speed chain rings on 9200 arms is going to be less than seamless.
9100 is designed around a 135mm O.L.D. and has a 43.5mm chainline and 146mm Q-factor. 9200 is designed around a 142mm O.L.D. and has a 44.5mm chainline and 148mm Q-factor. Not much difference, really. |
deja vu du
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They didn't use GORILLA GLUE?? LOL hahahahahaha
And yah, I said 2 years ago it's a STUPID idea. |
Originally Posted by Eric F
(Post 23022380)
What does plastic have to do with it?
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So did Shimano issue some type of procedure on how to inspect the cranks?
What exactly makes one fail and needs to be replaced? https://cdn.road.cc/sites/default/fi...0201143940.jpg |
First Gen Hollowtech FTW.
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Originally Posted by KerryIrons
(Post 23022686)
The cranks being recalled are composite.
"The last few generations of Dura Ace and Ultegra cranks have incorporated hollow crank arms and a semi hollow crank arm spider made of aluminum." https://www.hambini.com/shimano-cran...ring-analysis/ Aluminum...the same material as the cranks posted by trailangel. Sorry. CF isn't to blame for this one. Try again. |
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