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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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Old 08-21-20, 12:12 AM
  #36  
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New to this foldie. Previously got a dahon P30 bike but sell it off as its quite a speedy bike to ride. Trying to get a Brompton but it seem to be sold out and too expensive too. Came across this 3sixty on Korea website. Is this a good bike.
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Old 08-21-20, 02:36 AM
  #37  
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Cheap Brompton knock-off, and they don't sell overseas (Korea), which makes sense since those bikes are illegal.

If money is tight, consider the Dahon Curve (~$700), whose three-speed gear hub can be replaced with an eight-speed hub. Doesn't fold as compact as the Brompton, but cheaper, nice to have all the gears in the hub, and the Brompton baggage block can be easily modified to hook a Brompton front bag.

https://www.foldingbike20.com/dahon-curve-d3-review/
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Old 08-28-20, 11:39 AM
  #38  
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Originally Posted by Winfried View Post
... they don't sell overseas (Korea), which makes sense since those bikes are illegal.
Why are they illegal in Korea?
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Old 08-28-20, 04:37 PM
  #39  
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Ti and aluminum are subject to stress riser cracking..
the Ti tube wall thickness should be thicker than the steel..

For the fork steerer, it has to be added outside to fit the steering mast quill.. 1" inside..
so would be machined down @ the top for the headset threading.. ..
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Old 08-28-20, 04:57 PM
  #40  
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Originally Posted by fietsbob View Post
Ti and aluminum are subject to stress riser cracking..
the Ti tube wall thickness should be thicker than the steel...
Really, their strentgh is the same, Ti and steel. What property is this? Just trying to understand.

Last edited by Schwinnsta; 08-28-20 at 04:57 PM. Reason: Changed to the text
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Old 08-28-20, 05:09 PM
  #41  
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How they crack. under stresses..
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Old 08-28-20, 06:54 PM
  #42  
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Originally Posted by tcs View Post
Why are they illegal in Korea?
They're not. Or at least, authorities don't seem to care.

I meant: They're illegal in the absolute because they're just Brompton knock-offs, and the bikes would be seized if they dared selling them in the West. Which is why they don't ship overseas, especially to Western countries.

As to why Korea allows those bikes to be sold there is a mystery. It's a developped nation now and part of the WTO, but it looks like local judges don't care much about intellectual property when the owners are foreign companies.

Incidently, look what happened to Chedech, also from Korea:
https://www.bike-eu.com/laws-regulat...-case-10138237

"The CJEU ruling in Brompton’s case is potentially significant for many such creators, as it confirms that the prevalence of creativity in their designs may afford them copyright protection. However, it’s important to reiterate that the Brompton case is not yet over. It will be for the Belgian court to decide whether the design of the bicycle displays creativity and originality. Other recent cases have shown that the outcome of court rulings on copyright can be difficult to predict."
https://www.farrer.co.uk/news-and-insights/brompton-puts-the-brakes-on-copycats-but-its-not-over-yet/

Last edited by Winfried; 08-28-20 at 07:18 PM.
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Old 08-28-20, 08:37 PM
  #43  
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Originally Posted by fietsbob View Post
How they crack. under stresses..
They are about the same strength which means they crack about the same stress. Maybe steel has a little more ductility but I don't know this and was hoping you did.

Last edited by Schwinnsta; 08-28-20 at 08:39 PM. Reason: Changed to the text
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Old 09-07-20, 12:23 AM
  #44  
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Thank you.. Will look into dahon cruve d3
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Old 06-16-21, 10:22 AM
  #45  
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New full titanium model

I love this full titanium model. Have there been any reviews? How does this full titanium model compare to Bromptons? Is the quality any good? Thank you.
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