Gemini - Depierre ~ 1980 full restoration

[ionubd]

Hi all, I am sharing here my project of restoring a Gemini by Henri Depierre frame. Any advice, feedback will be much appreciated or sharing your projects 😊

This is how I got it:











As the bike have been already repainted in the 1990s I decided to repaint it to match original 1970s style, using the painted logos model as I liked these more vs. the decals used by Henri Depierre.

Some teaser photos as the frame is still with the artisan painter:











I am currently preparing the parts, Campagnolo nuovo/ super record group-set, Sakae Ringyo SL cockpit (would have preferred Cinelli but I could not find 22.00 mm short stem yet), Sugino bottom bracket, Selle San Marco Concor saddle.

I am thinking on using light blue bar tape and highlight with red/ light blue the saddle post (fluted - will need to repaint it) and red/ white/ light blue on the crank arm spider.






I am very anxious in seeing the final result, grateful for discovering Gemini - Depierre craftsmanship and all the info the members on this forum shared with me was very helpful.

I will come back with next steps photos, any advice/ feedback will be much appreciated!

[velo321]

The logos look good, although it seems a little oversized on the head tube. The height of the G should be ~4,6cm.

My suggestion is to mount a Campagnolo bottom bracket to match the crankset and most everything else.

[ionubd]

Thank you for you thoughts! I tried to find perfect compatibility for the BB with the 1981 Super Record crankset and also have top high end quality. This Sugino MW 68 114 French threaded was best that I could find so far, could not find matching Campagnolo in due time 😊.

Will measure the logo once I receive the frame, could be a little oversized but I believe not by much as the frame is very tiny (50-51 cm).

Question, for the Cinelli stems, is there a certainty that, if marked with a dot like the below, it should be 22.00 mm vs. 22.2?





Thx again!

[filoo]

hello ionubd, mine is 22.0 mm :

[ionubd]

Nov 19, 2023 18:56:28 GMT 2 filoo said:

hello ionubd, mine is 22.0 mm :

Thx!

[alainm]

No picture but so is mine: diam 22 and a hole dot. Mounted on my Gemini.

Edit: finally pictured

[ionubd]

After clear coat 🙂

[Munny]

Pretty

[ionubd]

Getting closer to the finish line with Gemini M7🙂

[Munny]

Hi Ionubd,

I see that you care.
I like these pictures
The copper grease is a good idea, anti seize and equalize potentials to prevent alloy corrosion.
I should adopt this (I use it for my classic cars)

Is the bottom bracket with french threads?
If so, I do like BSA for good reason : the right cup, for which you picture the greasing, will self unsrew while running.
On this side, for frenchy or Italian bottom bracket, I always use Loctite. At least blue one if not stronger.

I already ruined a BB due to this unscrewing and while I have enough Mavic no threads BB, I prefer to stay OEM

[ionubd]

Thanks a lot! I am not an expert but fortunately the bicycle mechanic that helps me with it is one of the most skilled on vintage bicycles, in my area 🙂 Not so many skilled mechanics with expertise in vintage bicycles in Romania.

The bottom bracket is French threaded 🙂

[ionubd]

Finally, the Gemini has landed, more photos to follow 😊

[Munny]

Just a bit different ...

Congratulations!

[ionubd]

Thank you! The craftsmanship of the Gemini frames is exquisite, I had it it my living room and kept staring at it in admiration.

Also, I believe the painter did a very good job 😊

Some close details I got to catch:

[goty89]

Jan 26, 2024 10:02:08 GMT 2 Munny said:

Hi Ionubd,

I see that you care.
I like these pictures
The copper grease is a good idea, anti seize and equalize potentials to prevent alloy corrosion.
I should adopt this (I use it for my classic cars)

Is the bottom bracket with french threads?
If so, I do like BSA for good reason : the right cup, for which you picture the greasing, will self unsrew while running.
On this side, for frenchy or Italian bottom bracket, I always use Loctite. At least blue one if not stronger.

I already ruined a BB due to this unscrewing and while I have enough Mavic no threads BB, I prefer to stay OEM

Hi, I find the photos realy interesting and the result is impresive. I recently discovered a blog online that discusses a rust converter to protect stel, which seems to be a promising solution. Personaly, I already use copper grease to prevent corrosion, but I'm curious to try this new method. The blog's technical advice, particularly regarding French threads on the crankset and using products like Loctite to prevent unintentional unscrewing, is realy useful and relevant.