Bike porn

Nah. Looks cool. Doesn't break. All good.

Its not really about agreeing or not. You don't have to take my word for it, its widely studied and understood. Oxidation in the heat affected zone from welding creates embrittled areas. No ti framebuilder worth their salt will accept welds with any discoloration beyond a light straw. A bicycle frame with heavy oxidation is very likely to fail fairly quickly, embrittled areas produce stress risers and micro cracks which turn into full on cracks.

Its not impossible to get away with discoloration if you use really heavy wall tubing, however best practice in the vast majority of ti welding applications is to produce a colourless weld, or as close to that as possible. If you look at any of the best ti framebuilders, moots, bingham, enigma,seven, they all have pretty much colourless welds.
You do sometimes see fabricators purposefully heating up and discolouring custom supercar exhausts for aesthetic reasons. But these are non-structural parts so they can do whatver they want with them.

Read below if you're interested/dont believe me

https://www.excelco.net/welding-techniques/titanium-welding-unique-benefits-unique-challenges-unique-risks/

https://www.youtube.com/watch?v=TLbC5Qlpjgw

https://www.twi-global.com/technical-knowledge/job-knowledge/weldability-of-materials-titanium-and-titanium-alloys-024#:~:text=At%20temperatures%20above%20500%C2%B0,oxide%20generates%20an%20interference%20colour.

Mmm nah.

Plenty of bikes and parts in the wild with multicoloured welds doing fine. Just as there are plenty with boring and cracked welds, and cracked tubes outnumber either of those.

Bigger things to worry about in the real world. Like owning a Moots.

Plenty of bikes and parts in the wild with multicoloured welds

But not many aircraft 🙂

...Usually because they're riveted together, not welded. But I see what you're saying - don't try to fly your rainbow bike like an aircraft.

Perfect

1 Attachment

Oh. He still rides bikes?

😅

Albeit this one still comes with a seat tube

2 Attachments

I'm sure it'll be nice when it's finished, unless the holes in the frame are purely decorative.

Nice welds anyway.

Damn, that thing was pretty damn rad for its time, even without the weird wheel and fork.

Look at the parts on it! Toeclips, and not even a slant parallelogram RD! How does it get to be carbon?!

I thought the only carbon bikes in those days are plain tubes bonded to ally lugs.

That was 1985. Mike Burrows made the first version of his Windcheetah that year. In his autobiography he claims it was the first monocoque frame https://www.podiumcafe.com/book-corner/2017/6/13/15791878/from-bicycle-to-superbike-by-tony-hadland-and-mike-burrows
I wonder whether he really beat Battaglin to it? It must have been nip and tuck.

he claims it was the first monocoque frame

Nearly all "first" claims turn out to be spurious. You would have to narrow the claim to "first carbon fibre monocoque" in order to exclude the aluminium Moulton Mk1

1 Attachment

https://forums.thepaceline.net/showthread.php?p=3041593

1 Attachment

Yeah

It's very nice but a bit softcore compared to the start of the page.

Call me old fashioned but I'm still into lopros

2 Attachments

That Motta is one of the best imo

Are frame only accepted?

1 Attachment

It's a YES !

^^ Unfortunately let down slightly by the scrotum

So good