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Argh. Drilled the top off one rivet. Both the rivet and the cable guide is epoxied to the frame. Need to drill out the core of the rivet to be able to replace it with a new one. Had I known then probably would just have soaked it in evaporust and polished instead. Have polished the frame, very...

Here's an interesting thing ;) https://nevi-titanio.com/en/titanium-wood/

Eds, sounds like 953 had some issues. Is 853 better in your view?

Hmm. Regarding low fatigue resistance, this does sound a bit counter intuitive. Surely, CP is considered not fatigue resistant enough for cycling frames, but 3-2.5 which can be drawn (while 6-4 cannot and hence is used as sheet or machined) is considered very strong, so much so that less...

Thanks for sharing insights! I know more about developments from the mid 80s forward and the mountain bike segment, so can mostly share insights about that. Yes, welding ti is difficult and the material cost is high. Still, objectively speaking, titanium is a fantastic material for hardtail...

:rolleyes:.

Nope, we just ride bikes. And calm ourselves down that way. Get big grins on our faces. Feel less hostile, and less need to fuel conflicts. Lots of hippies, for sure.

Hmm, I take it that you are not an avid mountain biker? :)

The development in titanium frame technology is interesting, I have the impression that great progress was made between ~1990 until 1995, mostly due to the two companies in Somerville, Merlin Metalworks that was instrumental in developing the procedures that led to very nice welds (double pass I...

Yep, there's a hole to the head tube. Ha, imagine riding around the countryside with that things rattling in there, might get a fan club of cows.

Identical to this. https://www.pinkbike.com/news/now-that-was-a-bike-alpinestars-ti-mega-2014.html

The continuous sheer force between the frame and cable stop of two wires (rear brake and front derailleur) in stretch may be too much for the epoxy without rivets. There must be a reason why it was built that way in the first place. Also visually, the rivets are needed, this is a layman...

Alpinestars

Here is a picture of a second, identical frame, maybe the difference in hue is more clear on this one. To me the cable stop looks like aluminium. Maybe there is a layer of epoxy or a gasket of some sort between the two parts for shielding.

Thank you. I am not 100% sure the other part is aluminium. Is there a simple way to get clarity on this without damaging it? I'm not sure I am seeing any corrosion on the part, but the hue is slightly different. It could possibly be titanium. The tube is for certain 3-2.5 Ti. I am assuming...

Hi and thanks for the reply. It's a high end mountain bike frame from 35 years ago. I would like a replacement rivet and am not sure what material is best to ensure it does not react with the other parts.

I need to replace a rivet that is holding an alu part to a titanium tube of a 35 year old bicycle. The rivet is quite rusty. It will see only mild weather, and will mostly be inside, with possibly an occasional exposure to rain. What material rivet will be best for this application?