Strida News Strida Forum About Strida Strida Reviews Where to Buy Photos & Videos Other Folding Bikes

Broken bottom tube: why?

Post a reply

Smilies
:D :) :( :o :shock: :? 8) :lol: :x :P :oops: :cry: :evil: :twisted: :roll: :wink: :!: :?: :idea: :arrow: :| :mrgreen:
BBCode is ON
[img] is ON
[flash] is OFF
[url] is ON
Smilies are ON
Topic review
   

Expand view Topic review: Broken bottom tube: why?

Re: Broken bottom tube: why?

Post by FDETABOADA on Wed Feb 14, 2018 4:07 am

Hello Guys,

I dont know how to start a new tread. Tonight while I was riding, my Strida broke out of the blue.

Fortunatedly, I was riding very slow and all of a sudden I fell sat on the road hitting my back,
and the back of my head on the road. When I woke up, I was there, lying on the road with a terrible headache and people surrounding me. I am still dizzy and my head is exploding, also am I very upset; the Strida was supposed to be a safy bike.

I call the Strida reseller here in Peru, and he mentioned that his own brother had the same problem, and that possibly it was metal fatigue. Of course, it was not. I had purchased that bike less than two years ago brand new, I had ridden it less than 8 miles per day mostly on safe bike roads.

What happened is that the tube (the one that holds the seat( broke in two pieces, as if it were perfectly cut with a knife, not with saw. I would like to post pictures, but I dont now how to.[https://photos.google.com/search/_tra_/photo/AF1QipPIJoX2V1eM2hX5fwoUoVDm8zHXdp5pdA-csVeo]
[img][https://photos.google.com/search/_tra_/photo/AF1QipMMpFf9WBww2ZPOBB3ks7ycuPE2pLvWRh-D-oLf]

https://photos.google.com/search/_tra_/ ... vWRh-D-oLf

Blackstridaaustria wrote:
invisiblehand wrote:Anyway, I just contacted the USA Strida distributor and should get more information soon.


I'm very curious for their reaction.

Could you please tell us anything regarding age and approximately mileage?

You noticed creaking for "some time", does that mean months or rather years?

Re: Broken bottom tube: why?

Post by Blackstridaaustria on Sun Feb 12, 2017 11:13 am

invisiblehand wrote:Anyway, I just contacted the USA Strida distributor and should get more information soon.


I'm very curious for their reaction.

Could you please tell us anything regarding age and approximately mileage?

You noticed creaking for "some time", does that mean months or rather years?

Re: Broken bottom tube: why?

Post by invisiblehand on Thu Feb 09, 2017 6:30 pm

Interesting thread. It turns out that my Strida just had the same failure.

https://flic.kr/s/aHskU2AmGS

I did notice more creaking over the past year but never a crack forming. Anyway, I just contacted the USA Strida distributor and should get more information soon.

Re: Broken bottom tube: why?

Post by Amuro Lee on Wed Dec 21, 2011 6:39 pm

It's really a happy ending. :D Congratulations! :mrgreen:

Re: Broken bottom tube: why?

Post by Blackstridaaustria on Wed Dec 21, 2011 11:14 am

I'm glad to read about these good news!

My words - Joffrey is a really nice guy!

A wave for Joffrey...

Image

Re: Broken bottom tube: why?

Post by StridaD on Wed Dec 21, 2011 10:43 am

I have a happy ending to report. Strida Europe / Vanmoof have sent me a replacement -- the SX -- and it is functioning well. It has the new EN-style frame, which I am pleased to say does give me an additional sense of confidence, and feels nice and firm. Thank you to Vanmoof for the prompt and fair customer service; special thanks to Joffrey!

As for the SX itself: I am very pleased with the handling of the bike so far. I didn't really think before that 18" wheels would make much of a difference, but it does seem zippier than the LT. My other concern was that the wheels would be too big for my commute, during which I stow the Strida on the luggage rack of a train, but this was not a problem. My recommendation would be go for the 18" wheels unless you have a specific need for smaller wheels!

Coincidentally, my first proper ride with the SX was on the day when we had our first snowfall here. It was mushy, icy stuff, which has often given me problems in the past. I had been planning on riding my Brompton instead, but it had a flat. :P So I gave the SX a chance, and I found that it felt much more stable in the snow, even with thinner tires! (It came equipped with 18" Innova 85 PSI tires.) Also, I didn't get any ice accumulating on the belt or the rear freewheel, or getting stuck between the freewheel and the snubber. I think the snubber position was already improved on the LT. I wonder if this was just a happy coincidence, or whether Ming was gathering data from riders in snowy climates. :)

Re: Broken bottom tube: why?

Post by StridaD on Sat Dec 10, 2011 5:16 pm

Thanks for the clarification, Amuro. That is interesting, AFAIK the 5.2 and SD are not even available in Europe. In fact, I had been led to believe that the LT was the successor of the 5.x series.

Re: Broken bottom tube: why?

Post by Amuro Lee on Sat Dec 10, 2011 4:19 am

Hi StridaD,

Only Strida 5.2, SD and SX in Hong Kong have the new EN frame. All LTs in Hong Kong still have no EN frame at the moment.

Best regards,

Amuro

Re: Broken bottom tube: why?

Post by Blackstridaaustria on Fri Dec 09, 2011 4:24 pm

No problem, :oops:

Many thanks to J.B. of Vanmoof for the fast reply!

:D

Re: Broken bottom tube: why?

Post by StridaD on Fri Dec 09, 2011 4:12 pm

Wow, thanks for your speedy detective work, BSA! :D I was also doing some more detective work here on the forums, and there is a thread where Amuro mentions that all LTs in Hong Kong have the EN frame. So maybe we Europeans are stuck with the choice of an inferior frame or upgrading to the SX? Which isn't really an upgrade if you like having the smaller tires. :cry:

Re: Broken bottom tube: why?

Post by Blackstridaaustria on Fri Dec 09, 2011 3:52 pm

I'm very sorry to hear that.
You did not mention if you were injured during that action, hope not?

StridaD wrote:Can anyone confirm that all new Stridas have this? Or are they still making ones with the same inferior weld?


today BSA wrote:Hi Vanmoof Team,

at Stridaforum we have a new report of a broken bottom tube at the welding of the bottom bracket mount (Germany).

Therefore I would like to ask you:

Will ALL new Strida's come with the new frame, which has passed the EN Test?
Meaning strongly different bottom bracket mount with longer welding and reinforcements at the steering tube's head and locking mount?

(For example, the EN frame is shown at the SX only of the Strida 2012 French catalogue?)
http://www.strida.fr/wp-content/uploads/2011/06/Catalogue-Strida-2012.pdf
page 17/32

Best regards,
BSA


Vanmoof wrote:Hi BSA,

Thank you for your email.
I received the email from the client with his broken frame.

At the moment the LT has no EN frame and is also not planned to get one.
The SX has it already.

We will discuss it with the manufacturer, but at the moment this is the first LT with this problem.

Thanks for your info and have a nice weekend.

Met vriendelijke groeten / Warmest regards,

Vanmoof Team



:|

Re: Broken bottom tube: why?

Post by StridaD on Fri Dec 09, 2011 9:08 am

It just happened to me again. :( 1-1/2 years after the first incident. Hopefully if they ship me a replacement LT it will have the new reinforced bottom bracket. Can anyone confirm that all new Stridas have this? Or are they still making ones with the same inferior weld?

Re: Broken bottom tube: why?

Post by Blackstridaaustria on Fri Sep 30, 2011 1:15 pm

Hi tightfisted,

many thanks for your report.

tightfisted wrote:I can't find any mention of EN standards in the 5.0 manual or at Strida.COM.


We have here some pics of the EN reinforcements.

EN 14764 City and trekking bicycles - Safety requirements and test methods

Re: Broken bottom tube: why?

Post by tightfisted on Fri Sep 30, 2011 12:46 pm

Just been offered a replacement bike after suffering this failure for the second time on my Strida 5.0. (Tube replaced under warranty the first time) I've had the bike for 2 & 1/2 years.

Interestingly, the second failure was preceded by a persistent creaking from the bottom bracket area. I couldn't see a crack though until the tube failed catestrophically (for the bike not me). Inspection or the failed tube shows dirt on some areas of the broken surface so I must conclude the were fine cracks present for some time. If your Strida appears to be creaking from the bottom bracket, inspect these weld joints very carefully.

In my opinion the walls of the bottom are to thin and the welding process has created a weak point.

While waiting for a decision I've been thinking about reinforcing the bottom tube by filling it with Epoxy Resin filled with glass bubbles to form a syntactic foam. Clearly this would invalidate the frame warranty but should prevent this failure at least. I can't think of another way to reinforce this tube without introducing stress points elsewhere.

I've been told that the replacement bike, Strida SX, is "an improved version with an EN Standards frame." I can't find any mention of EN standards in the 5.0 manual or at Strida.COM. If the bottom tube on the new frame has been redesigned and is genuinely stronger I won't need to worry about modifying it...

Re: Broken bottom tube: why?

Post by Ed on Wed Mar 09, 2011 8:30 pm

It seems to be all breaking around that part of the tube. could it be a bad welding job that stressed that joint there?? I better check mine before I start riding in the beginning of my season in April just to make sure everything is tip top. If I ever see a crack i'll call up ming and hopefully they can mail me a new bottom tube with that new BB that has a massive weld all around it. :).

We've had far less frame cracks than the other major folders it seems (dahon, brompton, bike friday(recall fix)) they where all on the seatpost which we don't have such a design.

Top