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New 3sixty bikes (Affordable Brompton Clone)

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New 3sixty bikes (Affordable Brompton Clone)

Old 03-24-19, 09:35 AM
  #26  
Raxel
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Originally Posted by berlinonaut View Post
The issue shown in the picture looks like the root cause would have been an overtightened stem nut. The question would be who overtightened it. Brompton is not free from failures but if they occur they usually handle them very generously (like the bottom bracket one lately). And if I remember correctly something was changed regarding the ti-forks not too long ago.
Root cause is a bad design (thin titanium steerer tube + archaic conical expander nut that puts too much stress on a line, not a wide surface), not overtightened stem. It is almost meaningless to tighten the expander nut using the torque wrench as the friction between the nut and tube is huge. Brompton SILENTLY changed the expander with a wedge for this year to handle this issue (without recalling last year's fork and stem)

Originally Posted by berlinonaut View Post
was the stem nut overtightened by the factory or did someone fiddle around with it later?
I did say they are factory assembled.

Originally Posted by berlinonaut View Post
did you place a warranty claim with Brompton and what was their reaction and handling of the issue?
They are not my bikes. Owners did place warranty claims and the local dealer said those Bromptons are modified (disassembled) by third party so they lost warranty. Fun part is that one cannot know their steerer tube is intact before taking the fork apart. They got a ton of flak for this policy and I think owners got them replaced eventually.

Originally Posted by berlinonaut View Post
One of the reasons why Bromptons are more expensive is that they actually have warranty, spare parts and customer support...
All others do as well.

Last edited by Raxel; 03-24-19 at 09:39 AM.
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Old 03-24-19, 09:57 AM
  #27  
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Originally Posted by Raxel View Post
Root cause is a bad design (thin titanium steerer tube + archaic conical expander nut that puts too much stress on a line, not a wide surface), not overtightened stem.
Ti-Bromptons do exist since 2005 - the issue seems to be pretty new. Maybe a coincidence after moving production of ti-parts back to the uk a couple of years ago. It thus is not a generic design issue but one of maybe having choosen a wrong tube or having had a bad series of tubes. Should definitively not happen, that's for sure.

Originally Posted by Raxel View Post
It is almost meaningless to tighten the expander nut using the torque wrench as the friction between the nut and tube is huge.
I personally do own two ti-Bromptons and -as far as I know - they do not have those issues. And I have had no issues tightening the nut correctly until now.

Originally Posted by Raxel View Post
Brompton SILENTLY changed the expander with a wedge for this year to handle this issue
One calls this process continuous improvement and it comes from Japan... Out of curiosity: How do you know about the silent change when it was done silent and secretly?

Originally Posted by Raxel View Post
They are not my bikes. Owners did place warranty claims and the local dealer said those Bromptons are modified (disassembled) by third party so they lost warranty. Fun part is that one cannot know their steerer tube is intact before taking the fork apart. They got a ton of flak for this policy and I think owners got them replaced eventually.
This is an issue with the local dealer and his tolerance I'd say. Or maybe he knows his customers and their abilities - obviously cannot tell. And from one possible perspective he might be correct: If a third party does work or maintenance on a bike during warranty that is not average service work (which pulling the fork is clearly not) - how would one know who caused the problem. The good thing about not knowing about the issue before taking the bike apart is obviously that it does not lead to a dramatic accident immediately. But obviously a failure like that is beyond any tolerance. According to European law an issue like that that pops up during the first six months after purchase would be assumed to be caused by the seller/factory unless they would be able to prove otherwise. This is the law, independent from any warranty that may be given by the manufacturer or not.

Originally Posted by Raxel View Post
All others do as well.
Dahon i.e. is famous for not doing so. Look i.e. at the thread in this forum dating from 2012 when Tern was founded and how people were joking it would would be a main differentiator from Dahon it Tern would actually offer spare parts.
Would be interesting to see how well 360 is able to handle warranty and support and spare-parts topics.
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Old 03-24-19, 10:07 AM
  #28  
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Originally Posted by tcs View Post
Owners' pics from Brompton Society:
Pics tell you that something is broken, They do not deliver the context how and why and neither how the issue was handled. So what are you trying to prove? That Bromptons do fail, too? That's pretty obvious. If you want a product with more than 1/2 a million samples in use out there that has not had any issues: good luck. I think I know at least two if not all three of the pics you showed and if I remember correctly there is a story around and behind it that you missed to tell.

Last edited by BillyD; 03-24-19 at 03:17 PM. Reason: Cleanup
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Old 03-24-19, 04:54 PM
  #29  
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The point being made here is that this specific type of failure is a result of atrocious design.
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Old 03-24-19, 04:56 PM
  #30  
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Moderaters, it sure would be great to some day have an ignore button on this forum! - Just thinking...
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Old 03-24-19, 05:06 PM
  #31  
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Originally Posted by wesgreen View Post
Moderaters, it sure would be great to some day have an ignore button on this forum! - Just thinking...
There is an ignore capability.

1. Click on User CP. It is on the left side in the blue stripe near the top of the page.
2. Scroll down to Edit Ignore List and click on it.
3. In the box that opens up, enter the User Name of the person who you would like to ignore.
4. Click on the Okay button.
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Old 03-24-19, 06:43 PM
  #32  
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Duh - I could have searched for that. Thank you!
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Old 05-19-19, 04:03 AM
  #33  
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Hi, I've been looking for information on the 3sixty bikes, I saw one with a derailleur and a 9 speed cassette online.

Was wondering if anyone had tried it?
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Old 07-13-20, 04:49 AM
  #34  
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Originally Posted by Raxel View Post
And here's my build with custom 3d printed tensioner (with integrated pusher mount)
It weighs 8.3kg now with heavy aluminium seatpost, riser handlebar and stock brakes.
Hey Raxel, wondering if the 3d printed tensioner with chain pusher mount is being sold. I've been looking for a better solution than glueing a nut for it which is prone to misalignment since I can't find a guide of someone doing this except for you. 😆
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Old 07-13-20, 10:16 PM
  #35  
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Originally Posted by Raxel View Post
Being more expensive do not automatically mean having better quality. They are all from FACTORY ASSEMBLED 2018 UK bromptons.





over tightening the stem quill wedge can do that...
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