Huge Shimano crank recall

[Thoglette]

I did this, does it count?

I’d say so. No obvious defects & a grey looking surface, I assume?
Any more to the story?

[P!N20]

I’d say so. No obvious defects & a grey looking surface, I assume?
Any more to the story?

Half of the break was corroded and half was silver-grey, which tells me that it was a crack that got so far and then gave way.

Edit: this isn't mine, but similar to this: http://pardo.net/bike/pic/fail-001/cran ... -70s-1.jpg

[blizzard]

I’d say so. No obvious defects & a grey looking surface, I assume?
Any more to the story?

Half of the break was corroded and half was silver-grey, which tells me that it was a crack that got so far and then gave way.

Edit: this isn't mine, but similar to this: http://pardo.net/bike/pic/fail-001/cran ... -70s-1.jpg

Classic fatigue crack and then brittle fracture. You can see the fatigue in the "beach marks" that radiate out from the initiation site. Brittle fracture is the shiny rough part.

[baabaa]

powdery aluminimum oxide

Hmmm sounds good - Do you know the Shimano Original Part number?

SH-PO19.

Geo blocked.

[Thoglette]

Grant Petersens take

The crank isn't Shimano's fault. It was inevitable in a system (bicycle manufacturer-customers, bicycle riders looking to "upgrade," the media that accepts the advertising dollars and applauds new lightweight barriers broken and convinces readers that it matters. People who buy it. If SRAM has a crank that weighs 600g, Shimano's not going to be happy, and Shimano's customers won't be happy, with a crank that weighs 650g. The first thing a magazine staffer reviewer will do is weigh the crank.'

orever.

[WyvernRH]

Edit: this isn't mine, but similar to this: http://pardo.net/bike/pic/fail-001/cran ... -70s-1.jpg

Classic fatigue crack and then brittle fracture. You can see the fatigue in the "beach marks" that radiate out from the initiation site. Brittle fracture is the shiny rough part.

Absolutely - a classic failure example. The thing that my engineer's brain asks is - why did it fail there? The high stress point would be the pedal eye (I have seen several Campag cranks fail at the pedal eye back in the day) Would the crack have been kicked off by a casting/forging fault or road damage of some description? I can't easily see any inclusion faults or stress raisers in the crank body that would have acted as a locus.

Richard

[Mr Purple]

I just checked mine and somehow have 4/4 not affected by the recall.

My Ultegra and Duraace are too late, and 105 and GRX too cheap.

Probable for the best, given my track record I’m 100% I would have broken one.

[blizzard]

I just checked mine and somehow have 4/4 not affected by the recall.

My Ultegra and Duraace are too late, and 105 and GRX too cheap.

Probable for the best, given my track record I’m 100% I would have broken one.

Still probably worth having the shops inspect your Ultegra and DA cranks when you do get your bikes serviced, as at least one person on Weight Weenies has broken crank that is outside the listed production batches.

[P!N20]

The thing that my engineer's brain asks is - why did it fail there?

Too many skids.

[uad782]

So the high end MTB cranks (XTR and XT) must be made differently, even though they are called hollowtech as well?

[Duck!]

Yes, they are manufactured differently. The affected Dura-Ace and Ultegra cranks have the inner and outer parts of the crank arms glued together, while all other Hollowtech and Hollowtech II cranks are welded joints.

[g-boaf]

I just checked mine and somehow have 4/4 not affected by the recall.

My Ultegra and Duraace are too late, and 105 and GRX too cheap.

Probable for the best, given my track record I’m 100% I would have broken one.

My FC-R9100P was from the lovely people at Bikebug in Tempe when they were still there. Now that shop is gone along with so many others.

I guess I’ll take it to another shop when I get a chance.

[warthog1]

got some older 10s ultegra and dura ace chainsets. No longer used.
3 sets of 105 11s. Saved by being a tight wad.

[grt046]

1 out of 2 Ultegra for me 6800 on Defy (2014) and 8000 set on the Orbea which is 2021 vintage

[twizzle]

...
I remember TLL doing that too.
I still follow him on Strava over in France. He rides a lot less and more gravel, offroad. Some good photos at times.

And with that as a starting point (I'd lost contact with him many years ago!), I was able to track him down to his insta and then his strava account.

Thank you!

[warthog1]

...
I remember TLL doing that too.
I still follow him on Strava over in France. He rides a lot less and more gravel, offroad. Some good photos at times.

And with that as a starting point (I'd lost contact with him many years ago!), I was able to track him down to his insta and then his strava account.

Thank you!

No worries.
It'd be great if you both posted here again!

[twizzle]

I might lurk less.

[blizzard]

I was in a 99 Bikes today, apparently the Australian inspection program kicks of on the 16/10/23. They hadn't really received details on how it will work yet...

[foo on patrol]

...
I remember TLL doing that too.
I still follow him on Strava over in France. He rides a lot less and more gravel, offroad. Some good photos at times.

And with that as a starting point (I'd lost contact with him many years ago!), I was able to track him down to his insta and then his strava account.

Thank you!

I see him on Strava and have the occasional conversation.

Foo

[jasonc]

I was in a 99 Bikes today, apparently the Australian inspection program kicks of on the 16/10/23. They hadn't really received details on how it will work yet...

details are still light on the ground
first class action in the US
https://road.cc/content/news/lawsuit-fi ... usa-304439

[AUbicycles]

I still have to bring my cranks in, but stopped by my local bike shop this week (to confirm) and they knew very little and had not yet had any inspections.

In Australia I saw news today that the ACCC and Shimano Australia had created an App for bike shops to process these inspections.

On Youtube, I spotted a UK bike shop who posted a walk-through of the review process (lodging information / photos of each inspection on a Shimano website) and giving it a pass or fail.

Here the staff member will give it a 'fail' or an 'unknown'. I am speculating that liability could still be a topic and if a staff member / bike shop records a pass, but subsequently it fails - this could open up messy legal situation. I don't know how this is being handled -

[g-boaf]

I had a look at my 9100 power meter crank and visually it looks okay, but will take it to the shop because it's one of the affected ones. It came from Bikebug in Tempe who are now long since gone and the shop that installed it are also unfortunately gone, but the mechanic who did the work is still around and I was speaking to him yesterday about it, the process appears like it won't be too troublesome.

I had not realised the 9000 was also affected, I have a few of those I'll have to check.

[skyblot]

Here the staff member will give it a 'fail' or an 'unknown'. I am speculating that liability could still be a topic and if a staff member / bike shop records a pass, but subsequently it fails - this could open up messy legal situation. I don't know how this is being handled -

I don't understand this logic. Maintenance staff always make a determination whether a pert can remain in service or not. Every part that is inspected gets that decision made, it either passes or fails. If you inspect a set of brake pads and they are not worn below minimum thickness, you don't say "one day in the future they might be below spec so I'll class them as unknown and replace them".

As long as Shiman's inspection criteria is clear and unambiguous it should be a matter of saying that's a pass, and everything else is a fail.

[Thoglette]

I don't understand this logic.

Welcome to the wonderful world of the tort of negligence.

[Retrobyte]

In an email from the mailing list for Park Bikes today they have announced they are taking bookings for crank inspections ...

Shimano Crank Recall
You may have heard in the media that Shimano have released a recall for some 11 speed Dura-Ace and Ultegra road bike cranks. Not all cranks are affected by the recall; it is only some models produced between June 2012 to June 2019. Here are the cranks and model numbers that may be affected.

Park Bikes are a Shimano dealer and as such will be undertaking inspection of cranks. We have put together a form for you to fill out which will help us coordinate the Inspection process.

When you have completed the form (see below), we will reach out to you and plan the next steps.

The form will help us identify if you have an affected crank and allow us to collect the information needed to start the process.

It is imperative that you complete the form to allow our team to contact you with the next steps. We are currently working closely with Shimano Australia to ensure this is a smooth process and will keep you informed as details are released.

The form can be completed at the following link

** Note Shimano's return rate is 0.7% which is regarded as very good in our industry - ie. 99.3% of their products will never be sent back for warranty.
** Since 2012, we have had less than 50 warranty claims, and none of them have been rejected.