Home Made Bikes

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Posted: Nov 4, 2019 at 8:40 Quote
Looks cracking but I am slightly confused as to why you have a chain guide mounted upside down?

Posted: Nov 4, 2019 at 9:50 Quote
ratcat wrote:
Looks cracking but I am slightly confused as to why you have a chain guide mounted upside down?

ha, good spot. It's a temporary solution, my chain keeps jumping off the top of the chain ring so rummaged around the parts bin for a fix. If it works I'll order a top guide.

Posted: Nov 4, 2019 at 10:15 Quote
Very impressive @smalltownboycustoms. Congratulations!

Posted: Nov 4, 2019 at 10:16 Quote
smalltownboycustoms wrote:
Finally got around to finishing my 29er hardtail.
Along with making a cast pewter head badge.
Cast pewter headbadge

The head badge is super rad!

Posted: Nov 4, 2019 at 18:59 Quote
smalltownboycustoms wrote:
Finally got around to finishing my 29er hardtail.

Finally got around to finishing the handmade steel 29er hardtail
This is so rad!

Posted: Nov 5, 2019 at 2:35 Quote
Does anyone know of a european supplier of 7005 aluminium tubing - preferably T0 or T4?

Posted: Nov 9, 2019 at 16:30 Quote
Made a stand up bike out of an old 24" wheel MTB, great fun and everybody looks and thinks WTF!
(how to add photos?)

https://photos.app.goo.gl/SRRRvGyF66RzypoN8
https://photos.app.goo.gl/hmzUJQRGKbHzSRqc6
https://photos.app.goo.gl/2gKg4fWy5e89LnsZ6

Posted: Nov 9, 2019 at 16:46 Quote
foxonabike wrote:
Made a stand up bike out of an old 24" wheel MTB, great fun and everybody looks and thinks WTF!
(how to add photos?)

https://photos.app.goo.gl/SRRRvGyF66RzypoN8
https://photos.app.goo.gl/hmzUJQRGKbHzSRqc6
https://photos.app.goo.gl/2gKg4fWy5e89LnsZ6


Posted: Nov 9, 2019 at 17:33 Quote
Got it
SUB
Made the hinge and stem as well
Folding stem hinge

Posted: Nov 10, 2019 at 9:13 Quote
Thanks, I hate it.

Posted: Nov 10, 2019 at 23:24 Quote
sherbet wrote:
Thanks, I hate it.

Too many positive vibes lately?
You know what thread you're in, right? Going to see some botched stuff here.

Pimp

Posted: Nov 12, 2019 at 8:17 Quote
JimmyGrand wrote:
Does anyone know of a european supplier of 7005 aluminium tubing - preferably T0 or T4?

not europe but https://www.cycle-frames.com/bicycle-frame-tubing/home.php

reynolds is out of UK so they must have some sales somewhere? why concerend with heat treatment? 7005 doesnt need post weld HT. iir T0 T4 are not related to tubing but its been a loooong time since i read about that

Posted: Nov 14, 2019 at 0:02 Quote
lifted-d wrote:
JimmyGrand wrote:
Does anyone know of a european supplier of 7005 aluminium tubing - preferably T0 or T4?

not europe but https://www.cycle-frames.com/bicycle-frame-tubing/home.php

reynolds is out of UK so they must have some sales somewhere? why concerend with heat treatment? 7005 doesnt need post weld HT. iir T0 T4 are not related to tubing but its been a loooong time since i read about that

Thank you, I´ll hit up Reynolds.

I might very well be wrong, but as far as I know, T0, T4 and T6(or any other Tx value for that matter), refers to the thermal treatment the aluminium has been exposed to, regardless of shape(tubing, block, etc.).

And in regards to the need for it with 7005 tubing, it seems some manufacturers use it some might not. If I´ve understood everything correctly the microstructure is messed up post-weld, therefore you "reset" the structure by heating to XXX temperature for a small amount of time - then cool the frame in air or liquid. Now the frame is of T4 quality(uniform microstructure), to optain T6 quality the frame needs to be aged for a certain amount of hours at a lower temp - this hardens and strengthens the frame.

I´m in no way an expert, but it´s my understanding that 7005 naturally ages at room temp, but in order to optain the optimum strength(T6) artificial aging is needed.

Posted: Nov 14, 2019 at 3:28 Quote
Don't think Reynolds do alu, no mention of it on the price sheet I've got.

Columbus do some alloy tubes I think

Posted: Dec 3, 2019 at 2:39 Quote
Alright guys, any got any picture of their alignment table set ups or ideas for a budget friendly design?


 
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