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How to identify a titanium frame on Brompton

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How to identify a titanium frame on Brompton

Old 01-24-20, 05:08 AM
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weight4it
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How to identify a titanium frame on Brompton

Hi I went to try a Brompton Superlight in a local friendly bikeshop, I was really impressed with the bike shop's knowledge and would recommend them for any bike or folding bike owner.

Anyway I was wondering, when considering second hand Brompton Superlights, how to tell if the components are titanium.

I understand you could:
1. weigh the bike
2. note the fork and rear triangle is painted a certain colour - unless it's a black edition or has been painted by the owner.

but is there a way to tell if the components are genuine Brompton or an equivalent high quality brand? Are they the same shape or form as standard? What is the difference?


Also I think some bromptons have been upgraded to titanium, is there a way to tell if a brompton is a factory superlight or has been subsequently upgraded?

I'm not too fussed as long as it's been fitted by a competent person, but it would be useful to know how to identify these parts if buying a second hand brompton.

Thanks!
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Old 01-24-20, 05:18 AM
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GTA
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Just bring a small magnet with you.
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Old 01-24-20, 05:52 AM
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weight4it
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Spot on! Good idea, I take it Ti is slightly magnetic but not as magnetic as the main frame (steel) on the brompton
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Old 01-24-20, 07:38 AM
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Originally Posted by weight4it View Post
...Ti is slightly magnetic...
Titanium is non-magnetic.

https://www.thebalance.com/metal-pro...tanium-2340158

...some say that's an outstanding and fascinating metal...drill it, file it or treat it with heat or electricity - then judge yourself...
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Old 01-24-20, 09:13 AM
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The titanium fork is looks different.

The titanium rear triangle has no pump mounting slot.
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Old 01-24-20, 09:19 AM
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Do they make aftermarket aluminum parts? would that be a concern if purchasing second hand?
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Old 01-24-20, 09:24 AM
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Originally Posted by weight4it View Post
Anyway I was wondering, when considering second hand Brompton Superlights, how to tell if the components are titanium.
Only way is using a magnet, as some version can have painted titanium parts (CHPT3 for example)

Originally Posted by weight4it View Post
is there a way to tell if the components are genuine Brompton or an equivalent high quality brand?
It's possible but you need to learn a bit about bike components first.

Originally Posted by weight4it View Post
Also I think some bromptons have been upgraded to titanium, is there a way to tell if a brompton is a factory superlight or has been subsequently upgraded?
It's basically the same, assuming the owner used the genuine titanium fork and rear triangle.
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Old 01-24-20, 09:43 AM
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Thanks Raxel, nice to hear from you as your Ti Bromptons inspired me to research more for a lightweight build.

I have been reading your build threads and am keen to get my dream Brompton, either build my own Ti from scratch / using standard Brompton 2 speed, or build upon a Superlight platform.


I think black or raw lacquer are my favourite standard colours, but the Ti polished finish is beautiful and suits the elegant style of the bike.

I am very tempted to invest in the Ti main frame but this means beans and bread for the rest of the year! Was there much fettling required to get the Ti main frame assembled?

Hope you are enjoying the bikes!

Last edited by weight4it; 01-24-20 at 04:57 PM.
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