pedal extenders broken?

[spiderman2]

Had both of my pedal extenders break yesterday, could have been dangerous had I not been riding slowly.
Anybody heard of these breaking before .

 

[DCLane]

I've had one go. Specialized will replace them apparently *

* Which reminds me, I've never replaced mine that broke.

 

[Yellow Saddle]

That design is an accident waiting to happen. The sharp transition from big to small will always break after time. The transition should have been given a small curve/radius. I am surprised they have not had an ambulance chaser lawyer on their case yet.

 

[mickle]

How both?

 

[spiderman2]

How both?

1 broke whilst pedalling ,as I removed the other one with a spanner it just fell on the ground!

Has me worried cause I have them on my other bike

 

[Drago]

That could have been nasty.

 

[spiderman2]

That design is an accident waiting to happen. The sharp transition from big to small will always break after time. The transition should have been given a small curve/radius. I am surprised they have not had an ambulance chaser lawyer on their case yet.

Was always a little worried about the design,think I will send them back to supplier and see what they have to say.

 

[bobones]

Anything to do with you?!
http://www.bikeradar.com/news/article/specialized-recalls-body-geometry-pedal-extenders-44807/

 

[HertzvanRental]

Is anybody aware of any pedal extenders that don't follow the above design format?

 

[spiderman2]

Anything to do with you?!
http://www.bikeradar.com/news/article/specialized-recalls-body-geometry-pedal-extenders-44807/

just got an e mail from specialized.

Hi Martin

Unfortunately the pedal axle extenders have been recalled due to a fall hazard.

At this moment there is no information regarding a replacement product.

Regards

 

[HertzvanRental]

A question for you engineers!! I have just taken delivery of a pair of pedal extenders from USA. Following the warnings raised by the OP I have contacted the supplier expressing my concerns. They have replied that as the units are milled from "billet steel",they are virtually impossible to.break.
Is there something in what they say, or is it load of humbug.
I am not an engineer so your replies would be appreciated.

 

[PhilDawson8270]

@HertzvanRental

If you can send me the dimensions of the extenders, I can run some stress analysis on different steels.

Slow evening at work

 

[Drago]

A question for you engineers!! I have just taken delivery of a pair of pedal extenders from USA. Following the warnings raised by the OP I have contacted the supplier expressing my concerns. They have replied that as the units are milled from "billet steel",they are virtually impossible to.break.
Is there something in what they say, or is it load of humbug.
I am not an engineer so your replies would be appreciated.

Billet is simply a posh engineering word for "nice big chunk of metal". Theyre usually extruded or cast. Basically, they're telling you nothing more than your extenders are carved out of a chunk of metal.

 

[PhilDawson8270]

Billet is simply a posh engineering word for "nice big chunk of metal". Theyre usually extruded or cast. Basically, they're telling you nothing more than your extenders are carved out of a chunk of metal.

Billet can be a term of concern for this kind of loading though too, as strength can also be dependent on the grain direction too.

 

[Yellow Saddle]

@HertzvanRental

If you can send me the dimensions of the extenders, I can run some stress analysis on different steels.

Slow evening at work

But you will not know what said billet is made from.

@HertzvanRental vanrental. Post some pictures of the gadget. The design speaks 1000 words.