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Comment by bluecalm | Hacker News Reader

There is another safety related recall going on right now - this time in the world of cycling. Shimano (the biggest parts manufacturer) is recalling more than 2 million cranks (and it's likely they will recall even more in the future). It seems companies are seriously afraid of US agencies in this area.

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Thanks for posting this. I’m going to check mine as soon as I get home.

https://bike.shimano.com/en-US/information/customer-services...

For quick reference the affected model numbers are DURA-ACE and ULTEGRA branded cranksets with the following model numbers: ULTEGRA FC-6800, FC-R8000 and DURA-ACE FC-9000, FC-R9100 and FC-R9100-P.

Luckily, mine are all the cheap Shimano ones. This is their top stuff isn’t it?

In biking especially the high end stuff is often made out of exotic materials for low weight and can do strange non-metallic thinks, like shattering.

These cranks are aluminum. The problem is that they are a hollow clamshell design to save weight. The bonding of that clamshell design is problematic.

The newer hollow cranks aren't problematic, so it can't be just that it's difficult to make a hollow crank. And it's not even that fancy any more, considering that the $100 FC-R7000 is also hollow.

Yup. The cheap 'heavy' ones are forged. Safe.

As they should be. Product safety should never be reduced down to a cost of doing business.

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