Brompton: Mounting adaptor for carrier block
07-08-18, 01:25 PM
#51
Senior Member
"What's the Difference Between Soldering, Brazing, and Welding?"
https://www.machinedesign.com/fastene...ng-and-welding
So it looks like the more realistic alternative is:
- Klickfix Caddy adapter
- Brompton luggage block + jubilee clip/hose clamp
Last edited by Winfried; 07-08-18 at 01:28 PM.
07-08-18, 04:49 PM
#52
Stardust
Well, I suggest you try out yourself the advice before you give it to somebody else. For a change I actually tried soldering alu, using both processes there in the market and they work poorly if at all. Do you suggest soldering steel to alu?? Do you want it to hold?? This is just absurd.
if you read well, you will see im saying its possible to solder aluminion lugs on aluminiun frame.
If you cant make it work or to lazy to find a good profissional you cannot say its impossible
i made atachments of fork for front carrier touring bike and its strong as bull for more 10 years.
Stell to alu? No.. i didn say that...its a crazy assumpsion.
JUST hire a framebuilder to fix and he will know what to do.
it will not ruin heat treatment as tig soldering doesnt heat the pieace itself, but put solder stuff in lug, making it more stronger that before..
Last edited by BromptonINrio; 07-08-18 at 05:06 PM.
07-08-18, 05:06 PM
#53
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its an nonsense statement.
if you read well, you will see im saying its possible to solder aluminion lugs on aluminiun frame.
If you cant make it work or to lazy to find a good profissional you cannot say its impossible
i made atachments of fork for front carrier touring bike and its strong as bull for more 10 years.
Stell to alu? No.. i didn say that...its a crazy assumpsion.
JUST hire a framebuilder to fix and he will know what to do.
it will not ruin heat treatment as mig soldering doesnt heat the pieace itself, but put solder stuff in lug, making it more stronger that before..
if you read well, you will see im saying its possible to solder aluminion lugs on aluminiun frame.
If you cant make it work or to lazy to find a good profissional you cannot say its impossible
i made atachments of fork for front carrier touring bike and its strong as bull for more 10 years.
Stell to alu? No.. i didn say that...its a crazy assumpsion.
JUST hire a framebuilder to fix and he will know what to do.
it will not ruin heat treatment as mig soldering doesnt heat the pieace itself, but put solder stuff in lug, making it more stronger that before..
P.S. At a reduced max load you can presumably live with an alu lug.
Last edited by 2_i; 07-08-18 at 05:19 PM. Reason: P.S.
07-08-18, 06:33 PM
#54
Senior Member
Fwiw...
I used the Kickflix caddy in my Korea tour without problems. I mounted it on the seatpost, holding an Ortlieb bag. Granted, I never loaded it beyond maybe 2.5kg of its 7kg rating...
07-08-18, 07:07 PM
#55
Senior Member
On older neobike brompton without lug. 
QR and Clamp versions
QR and Clamp versions
Last edited by bike.gang.uk; 07-08-18 at 07:29 PM.
07-09-18, 03:38 AM
#56
Stardust
07-09-18, 05:42 AM
#57
Senior Member
I'll pass on the brazing option since it would 1) ruin the paint and 2) require finding a professional to perform the same kind of surgery on an aluminum bike.
The QR option looks very interesting, OTOH, but is not currently found on the site:
https://www.bikegang.co.uk/bikeganghut/Brommie-c9803294
If you do manufacture it, it might be a very appealing option for Dahon/Tern/Strida owners as an easy way to use a Brompton bag.
The QR option looks very interesting, OTOH, but is not currently found on the site:
https://www.bikegang.co.uk/bikeganghut/Brommie-c9803294
If you do manufacture it, it might be a very appealing option for Dahon/Tern/Strida owners as an easy way to use a Brompton bag.
07-09-18, 05:59 AM
#58
Senior Member
07-15-18, 05:04 AM
#59
Senior Member
A QR Brompton block would definitely be a great product to stick on any non-Brompton bike.
On the Strida, you can't have it low on the headtube because it prevents folding the bike, but a QR block would be easy to remove when the user does need to fold the bike (although not as easy as simply leaving it permanently, but hey.)
On the Strida, you can't have it low on the headtube because it prevents folding the bike, but a QR block would be easy to remove when the user does need to fold the bike (although not as easy as simply leaving it permanently, but hey.)
02-15-21, 01:17 AM
#60
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This may not work for all bicycles, but seems to be another option: https://www.fantastic4toys.com/produ...-birdy-bicycle
JR
JR
02-15-21, 11:28 AM
#62
Senior Member
It might prevent the Strida from folding, though, as the two tubes get very close.The only way is to give it a try.
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09-19-23, 11:21 AM
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Wanted to revive this thread with a few photos of a DIY welded brompton block adapter. For context, this was my first attempt at welding (apart from a quick half hour practice session on scrap metal). This was done with a cheap flux core welder.
imgur[dot]com/a/0xT1ha1
imgur[dot]com/a/0xT1ha1
09-19-23, 01:41 PM
#65
Senior Member
Last edited by Winfried; 09-19-23 at 01:46 PM.
09-20-23, 12:49 AM
#66
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09-20-23, 10:04 AM
#67
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Yeah definitely not the prettiest welds (it was my first time welding!), but I think they should hold the 10kg limit many of the racks recommend.
Hard to get a photo of the inside of the tube, but there is a visible sign that the heat penetrated into the metal which is a good sign that the weld was effective. It doesn't take a ton of welding to create the kind of strength needed for a rack -- different story for structural frame welds.
Not trying to convince anyone to do it, just wanted to share my experience in case anyone else wants to venture down this path!
Happy cycling ya'll
Hard to get a photo of the inside of the tube, but there is a visible sign that the heat penetrated into the metal which is a good sign that the weld was effective. It doesn't take a ton of welding to create the kind of strength needed for a rack -- different story for structural frame welds.
Not trying to convince anyone to do it, just wanted to share my experience in case anyone else wants to venture down this path!
Happy cycling ya'll
09-20-23, 10:29 AM
#68
Schwinnasaur
The problem is that if this is welded as opposed to brazed, then you have lost the heat treatment of the metal around the area of the weld and thus weakened that area of the head tube.
