Geek Bike Family

What about the flux on the inside of the tubes?

Only the seat, head, and bb tubes on his own frames are open, everything else is sealed, so from what I could gather off him he gets it blasted.

Thanks - I thought it looked a bit wrong ! Is any other step needed after putting in water over night? Should it just brush off after?

Well wipe it off and put it in the sun. But make sure you got vent holes. I design my frames with big ol' vent holes so water drains out easily. I don't believe you can keep water out completely so instead I invite it in and make sure it can leave again

I invite it in and make sure it can leave again

exactly me when people come round for dinner.

Bdhu compliance for @hulsroy and bye

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really good :)

Rad!

I'm still shocked at Winston handing a frame back covered in flux. 😂
Not even bothered to file the fillets

Very nice bar setup. I will go to bed thinking about that.

Did the saddle slip a bit?

Man that is good

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Bike life

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I’m more concerned by

“Winston doesn't put steel in water, he just gets it blasted off before paint/powder.”

😅

And doesn't believe in vent holes

At least this set of stays doesn't have much to live up to in terms of durability!

i guess you two know more about framebuilding than him.

People who think not venting tubes keeps water out are on a par with people who think the world is flat.

In my opinion.

In my opinion

ATMO

😂

you experts might want to watch the last few reels from BTR on Instagram

You can't braze an air sealed tube though. Maybe TIG you can get away with it.

Just to clarify, he does have breather holes in the tubes whilst brazing, then once it's all brazed he fills em with brass.
Obviously I'm not a frame builder, and this is a genuine question, how does water get in a sealed tube?
Sorry for derailing with non Geekhouse matters, bikes looking splendid.

The theory goes that you can't actually seal a tube, there will always be micro holes somewhere to allow moisture, not water in.

But it's very difficult to seal a tube with brazing. There is a huge amount of heat that goes into the tube, the air inside the tube is heated and expands and consequently pushes outward so as you apply liquid brass to cover joints or holes, it tends to blow small holes in it

The theory goes that you can't actually seal a tube, there will always be micro holes somewhere to allow moisture, not water in.

Yeah, we aren't talking a tube filling up with water from being ridden through a river etc, small amounts of water vapour, moisture from the air, etc get in (temperature and pressure changes can effectively 'suck' moist air into a tube through a very small aperture) and this can, in my experience*, accumulate enough to be sloshing around inside a 'sealed' tube.

*Yes, I've cut up more than one frame that had no breathers and had ancient, stinking, rusty liquid pour out of the tubes.

I'm not saying every frame without breathers is destined to rust but my experience is that non breathered frames are generally in a worse state than those with breathers.

And I do find it quite ironic @TvH that you are pointing us to videos of someone who doesn't put breathers in his frames talking about having to fix rusty tubes. The video where there's a hole in the back of a seattube, in my opinion probably wouldn't have happened if the seattube was vented into the bb shell. He is also talking about powdercoat though which is a treatment I feel has no place on a bicycle but that's another conversation.

In the case of Vaz, if he is brazing and not soaking I find that concerning as while you can blast the outside of the tube fine, the only way (I know of) to get flux out of the inside of a tube is to soak it out. Maybe he's using a gas fluxer and that might mean that there is no flux inside the tube, I'm not too sure how that works.