Wanted Titanium Bottom Bracket

[MuchAlohaNui]

Hello,

I am looking for a titanium bottom bracket assembly. Would highly prefer Action Tec or Ultimate Machine...or anything you may have that is sub-155 grams with all the hardware (Boone, Gonzo, Hershey, TNT etc.). Doesn't necessarily need to be NOS or VGC and will consider just about anything functional as long as what you have is not beat to hell, like the aluminum cups stripped out for example.

112 x 68 mm
< 155 grams
JIS taper (Shimano taper)
15 mm (or narrower) aluminum bearing cup races (the parts that thread into the bottom bracket)
Introduced to the market any time before 1995

Thank you!

 

[synchronicity]

I had an Action Tec Ti BB. Back in the day.
The cups got metal fatigue (sharp edges on the flange if I recall).
It's not the best design as there is essentially no adjustable preload.

 

[MuchAlohaNui]

I had an Action Tec Ti BB. Back in the day.
The cups got metal fatigue (sharp edges on the flange if I recall).
It's not the best design as there is essentially no adjustable preload.

Interesting and good to know! Thank you.

 

[synchronicity]

Well, I did try to fit it to a 73mm BB shell with some homemade DIY spacers.
Cause, you know, I was intending to get a titanium frame with 68mm shell eventually.
Having said that, there is still no way to set the bearing preload.
I wouldn't buy another one.

I think they did replace the cups (once). But they soon failed again.

 

[MuchAlohaNui]

Was that an issue restricted to a certain generation or problematic across all? The 112 mm Action Tec is light as heck and I want one, but if there are known failures, I can move to something else.

 

[GCD]

why not better new than NOS ??
https://www.ebay.it/itm/18567977235...uzaKxq9ZSuqq0C8J/eeKxxV8JQ==|tkp:BFBM6IjU4NZi

 

[MuchAlohaNui]

Thanks for the link. Looking for 68 mm width though!

 

[M-Power]

Might have a 113mm Syncros Ti BB but its ISO taper so cranks will tighten on ~ another 2mm ( so should work ) Will have to check if interested. Many early bling Ti BBs are ISO btw

 

[wadsy]

I have Action tec and Syncros in my sales thread...

https://www.retrobike.co.uk/threads/parts-clear-out-lots.465116/