Injury from mechanical failure of Purefix cycle

[Mooseman]

I have been riding a Purefix for 2 years. Recently, while cycling around GM palya ( near Malleshpalya road ) the seat post of the cycle  snapped and I lost balance , falling pretty badly.
I landed on my back and took soft tissue injuries. I was basically immobile for 8 days. The pain and suffering I experienced in those 8 days were the worst of my life.

I tweeted both BOTS and Purefix about it a couple of days after it happed.I have recieved absolutely no response from either of them. A responsible cycle shop should own up mistakes they make. Mistakes that put lives of people in danger.

I have sent emails to both BOTS and purefix. Hopefully they acknowledge the issue and improve the quality of the seat posts and not let this happen to another customer. People's lives are at stake.

[Shankar Shastry]

Wow. The last time something like this happened, it was on a hercules ACT110 and around 8 years ago IIRC. A well made alloy seatpost should not break off like that. I for one am happy that I'm building a purefix from the frame up and used a different alloy seatpost than from pure cycles.

Also, I'm quite surprised BOTS hasn't responded - why don't you try emailing them instead of social media?

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[Mooseman]

I have mailed them as well. Waiting for a reply.

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[TFN Deepak]

I would appreciate if you walk in to BOTS showroom where you have bought it. Complaining on Internet or social media wont work.*

And its 2 years and i am sure it has gone with enough stress but this is less possible issue as these products are made for life time usage and covers life time Warranty

*i am mention this considering that you haven't physically visited them with faulty product

[Ali Poonawala]

I was not aware seat posts come with life time warranty...

Frame yes..

Seat post is basically compromised area from stress point if view...

A frame holding the seat is joined to a metal pipe....

Can you give life time guarantee ?

Just wondering..

No technical input here...

Ali

[TFN Deepak]

Ali Sir, I am also not sure about it.Just Guessed as its not a moving part.

[Rohan Kini]

Hey Mooseman,

Just seeing this. Shucks, sorry to hear about this unfortunate experience. Falling off your bike is not cool.

We can directly reach out to Pure Fix on this case. We're put hundreds on Pure Fix bikes and this is a first. These guys are pretty good with warranty and rider support, which is one of the reasons we work with them to bring their bikes for Indian cyclists.

We do our best to handle customer service and ensure its super fast. We do fault at times, only because we don't know about the issue and not because we don't want to do anything about it. 

I will reach out to you directly on this.

Again, super sorry about your experience. It should not happen to any rider - Pure Fix or any other brand.

regards

Rohan

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[Ali Poonawala]

Rohan's response should help a bit to soothe the damage...!

By The Way, 

What is the white powdery stuff on both sides inside the hollow post ?

Curious as the cat !

Ali

[Amar]

Unfortunate Indeed hope you do not have any severe injuries

Have been riding a Schwinn Sporterra & Trek 7.1 FX both have Alloy Seat Posts without any issues 

Steel Seat Posts dont have snapping issues unless rusted

On Thursday, 24 May 2018 14:24:48 UTC+5:30, Mooseman wrote:

[itisravi]

Was the seat post raised above the minimum insertion marker by any chance?

-Ravi

[Narayan R]

Sorry for your injury. Seat posts are designed for life time  even though not warranted. 

This is a weird failure mode for a seat post.

If you don't mind, can I have a look at the broken sample. Please don't throw them away.

Please share more photos if possible of the cross section, a spot of failure.

These are for academic interest.

Sorry again for your injuries.

With Regards,

 R Narayan

[Opendro]

From the second pic, it is clear that the saddle was pushed too far behind. That will put too much stress on the post. This is not to suggest that it should break. Just saying. Yeah, the way it broke so cleanly, it is unacceptable.

On Thursday, May 24, 2018 at 2:24:48 PM UTC+5:30, Mooseman wrote:

[Jayaprakash E]

Unfortunate incident. Pray for your complete recovery. Thanks for sharing it here, so that we can double check the bicycle parts frequently.

[drshankar tv]

As it’s been highlighted by Opendro, seat is pushed back completely which would have put undue pressure on the seat post resulting in snapping due to leverage effect.. which is unfortunate, hope this will be a lesson for us.

Shankar.

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[Girish V]

Unless the seat rocks due to this position, I do not understand why the seat post should break like that?

It looks eerily similar to my hercules act 110+ seat post which broke exactly at the same spot due to bad

welding. Luckily that was not sudden and the protrusion from the top end of the seat post saved me from 

falling.

For another question of raising above the minimum mark, in that case the post should break close to where 

it gets attached to the frame, not near the seat as in this case.

Definitely its a manufacturing defect and un-lucky for the OP to get one :(

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[Prashanth Chengi]

It doesn't have to rock. The stresses would be insane, if the seat is that far back. To understand leverage causing stress failure, take an ordinary matchstick and hold its head tightly between your thumb and forefinger, and with a finger from your other hand, press down firmly at the tail end of the stick (no rocking required); the matchstick will snap without much effort. Take another matchstick and now hold it about midway between your thumb and forefinger and repeat the exercise. You'll observe that it won't break unless you apply a greatly higher amount of force. I mark my seatpost with a piece of tape to mark my preferred height; it's probably a good idea to mark the saddle position on the rail also.

/Prashanth 

[Ali Poonawala]

Looking at the metal railing ends...One end is well housed but another seems out of housing..

That will apply torque too, apart from simple leverage..

Do the more enlightened members agree ?

Ali Poonawala

[Mooseman]

Wanted to close this thread. I ended up getting a refund from Purefix.

I took almost a month to completely recover. I'm back on the saddle.

On Thursday, 24 May 2018 14:24:48 UTC+5:30, Mooseman wrote: