Bought this stem for quite a bargain about 1,5 yr ago. Thoght I’d share some pictures from the restoration process, as I couldn’t find much info when I was working on this one.
Shimano EX 7200 series – 1978
Aerodynamic testing is now the talk of the town. Everything has to be aero-optimized. The screws are accessed from the inside of the stem. This allows for more aerodynamic gains.
The screws are made with left-handed threads, allowing for right handed work with the hex key. Also, both of the tightening screws have a step-down element (bigger diameter -> smaller diameter), which increases torque whilst decreasing travel.
While some ppl might be terrified of my decision to polish the stem, I really enjoyed getting rid of the deep grooves on top. This stem is in use in my daily bike, as I see it as a functional, yet beautiful component. Not so much as an item worth collecting.
1. The stem after polishing.
2. All the components inside of the stem.
3. The head tube screw and the wedge (last of which is mounted upside down).
4. The handlebar screw assembly.
5. Stem in use with a New Old stock alloy cap. (Ebay)
6. Before bike rebuild.
I hope this helps the few people who have shimano stems.
by SpecificTelephone8
7 Comments
Jewelry
Great work!! What bike are you using this on?
Love the graceful lines of the older stuff. Not the boxy, chunky, esthetic of today. Everything today looks like a bad polygon computer game render from the mid 90s.
It’s actually Shimano Dura Ace AX 7300, early 80s.
I know this as I have the same stem but the tier below DA, Shimano 600 that came with a bike I bought:
https://velobase.com/ViewGroup.aspx?GroupID=cf9cf43d-e652-4e29-bf8e-ec5d90134924
Beauty! Thanks for the great pictures; I have one of these, incomplete, and now I know what it’s supposed to look like 🙂
I saw these caps for sale on eBay, looking for one myself. Technically not a NOS cap since a real one would have the Shimano Japan lettering but good looking though. Are you happy with the fit?
I had a full AX setup on my Motobecane Profil 3. Still miss that bike.