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Full titanium Brompton clone, now done (pics)

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Full titanium Brompton clone, now done (pics)

Old 03-11-19, 10:14 AM
  #51  
fietsbob 
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Steel alloy , It may be a choice for the needs of production, brazing with torch arrays, automated bender,
and all that .. reliable efficiency advantages .

Bike Friday uses 4130 , I think ..

Saying you use a higher value tubing , helps justify charging more,

in your higher end race type frames...




....

Last edited by fietsbob; 03-11-19 at 10:17 AM.
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Old 03-17-19, 04:57 PM
  #52  
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Excuse me if I missed this in the thread, I just skimmed it and didn’t seen any mention. Are these the parts sold by the ‘easyti’ brand on eBay, Raxel and/or Brompton_X?
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Old 05-19-19, 11:38 AM
  #53  
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I've done a major update - swapped the fork and rear frame with black ones, stem with brushed titanium one.







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Old 05-28-19, 12:28 PM
  #54  
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Hey Raxel, would you be able to send me the CAD files for the chain tensioner you designed? I want to mill my own tensioner and don't have the measurements yet.
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Old 06-12-19, 08:07 PM
  #55  
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Now I'm adding some exotic bits...



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Old 06-15-19, 10:11 PM
  #56  
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Hi Raxel, where did you get the expander cone for the quill stem. The tiparts ones do not come with bolt and the expander cone is really hard to find.
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Old 06-15-19, 10:36 PM
  #57  
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Originally Posted by Seahxkg View Post
Hi Raxel, where did you get the expander cone for the quill stem. The tiparts ones do not come with bolt and the expander cone is really hard to find.
You can get one from brompton.. which is NOT recommended with stock ti fork as the expander may damage the steerer tube.

Brompton silently replaced the expander with wedge. Tiparts now sells aftermarket quill wedge too (you need to cut the handlepost tube to mount it though)
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Old 06-16-19, 07:29 AM
  #58  
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I have bought titanium clone Brompton frames twice from two different suppliers, but didn't keep any of them in the end.
In general, the quality seemed OK, but, the problem is the tolerances. One frame can't fold the stem into the 100% correct position, the other has a problem at the rear damper bracket.

I know the authentic Brompton frame could also have similar issues, but these third party stuff sometimes are unpredictable.
Or perhaps I was just unlucky?


Anyway, nice build! Impressive weight!

But I do not recommend others to follow.
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Old 06-16-19, 07:53 AM
  #59  
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Originally Posted by Raxel View Post
Now I'm adding some exotic bits...



Come on these are crazy~~
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Old 06-16-19, 10:20 AM
  #60  
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I love bromptons but they are so friggin expensive! How much was the build cost?
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Old 06-16-19, 01:59 PM
  #61  
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Originally Posted by VeloG View Post
I love bromptons but they are so friggin expensive! How much was the build cost?
just to ilustrate how steep the costs on this bike were..... just the thb clavicula carbon crankset, alone, costs 1.200,00
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