First Generation Dura-Ace was reborn with some minor modification around 77/78 as 7100 series. Before then it had an unorganized set of model numbers which seems to have changed at least once between 74 and 76.
Dura-Ace Track ensemble (Dura-Ace 10?) was named 7000 series
Dura-Ace EX was the 7200 series (78 - 84?, though some parts 7200 were not introduced till 80 or later) Dura-Ace AX was the 7300 series (80/81 - 84?). and so-on.
Been doing a bit of reseach on 70's - 80's Shimano lately as I build up content on VeloBase.com so most of this is fairly recent in my mind.
Jon Fischer Dallas, Tx
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From: loudeeter@aol.com To: classicrendezvous@bikelist.org
Subject: [CR]Fwd: Shimano DuraAce series numbers, 7100, 7200, 7300....
Date: Mon, 29 Oct 2007 11:10:10 -0400
Dale asked:
So... after first gen DA, there was EX? (Did it have a series number designation?)? What were the functional years for that stuff? Fit into our 1983 frame of refrence? Then AX came out in 1982-83 I think???
-----Original Message-----
http://www.sheldonbrown.com/
Go to Sheldon's site, above for the 82 dealer catalog, you can click the EX or AX groups and see that they have series numbers. AX was the 7300 series, EX was the 7200 series. 7100 is shown for some of the parts on the Ensemble.?? Lou Deeter, Orlando FL
From: oroboyz@aol.com To: Stronglight49@aol.com; classicrendezvous@bikelist.org Sent: Mon, 29 Oct 2007 10:44 am Subject: Re: [CR]Was: 1983 cutoff. Now Shimano actually collectible???
Bob wrote:
Below are some examples of what I mean. ---------------------------------------
Dates shown in Brackets [--/--]?are the?introduction dates of these Last versions,
as?dated on Shimano's specification sheets.? Some were actually continuations of
earlier AX or EX models.? And, some continued for several more years into the 1990s.?
Others were soon discontinued?due to?modifications to accommodate STI (1991)
I discovered these distinctions when "Restoring" a NOS frameset from circa?1990
with a?full contemporary pre-STI D-A gruppo.
--------------------------------------
? BB-7400 Bottom bracket ---? Last square taper spindles with ball bearings and steel cups [09/88]
FC-7402 crankset / 7402 chainrings --- Last polished silver rings without any take-up puns & ramps. [09/88]
BL-7400 Brake levers --- Last non aero [06/85]
BL-7402 Brake levers --- Last of the true "Dura-Ace" pantographed aero levers... Last D-A levers before STI [08/88]
BR-7400 Brake calipers --- Last single pivot brakes [08/88]
SP-7400 Seatposts --- Last of the 1-piece forged alloy posts (by Nitto) [10/85]
HS-7400 Stems --- Last of the invisible bolt stems (again Nitto) and Last D-A stems ever.[10/85]
HP-7400 Headset --- Last ball bearing headset [09/88]
SL- 7402 d/t shifters --- Last D-A pantographed? (9-speed had Dura-Ace painted on) [11/88]
Great work, Bob! Figuring out exactly when all this stuff was made is a tough job! Glad to see you have provided that info.
I admit I get glazed-over eyes when all the Shimano series numbers are talked about. ? So... after first gen DA, there was EX? (Did it have a series number designation?)? What were the functional years for that stuff? Fit into our 1983 frame of refrence? Then AX came out in 1982-83 I think???
Dale Brown Greensboro, North Carolina USA
-----Original Message----- From: Stronglight49@aol.com To: classicrendezvous@bikelist.org Bcc: OROBOYZ@aol.com Sent: Mon, 29 Oct 2007 12:42 am Subject: [CR]Was: 1983 cutoff. Now Shimano actually collectible???
Roberto A. Clair wrote:
<< ...What i would give for a decent Shimano Dura Ace 7400 group today>> -------------------------------
Dale Brown pondered:
<< ...Are we seeing the start of a new era?? Up till now, vintagesque folk yearned for 1st gen Dura Ace, Dura Ace AX, maybe bits of early Deore and Arabesque 600, but now ....7400????>> ---------------------------------
Dale,
I don't think they could possibly?be considered "vintage", But?many of the components
manufactured by or before 1990 seem to mark yet another notable cut-off point of sorts,
before introduction of later truly modern component changes.
In some cases, these would?even include the very first of the 8-speed components.
Perhaps these features are among those which Robert Clair considers of value... as do I.?
Below are some examples of what I mean. ---------------------------------------
Dates shown in Brackets [--/--]?are the?introduction dates of these Last versions,
as?dated on Shimano's specification sheets.? Some were actually continuations of
earlier AX or EX models.? And, some continued for several more years into the 1990s.?
Others were soon discontinued?due to?modifications to accommodate STI (1991)
I discovered these distinctions when "Restoring" a NOS frameset from circa?1990
with a?full contemporary pre-STI D-A gruppo.
--------------------------------------
? BB-7400 Bottom bracket ---? Last square taper spindles with ball bearings and steel cups [09/88]
FC-7402 crankset / 7402 chainrings --- Last polished silver rings without any take-up puns & ramps. [09/88]
BL-7400 Brake levers --- Last non aero [06/85]
BL-7402 Brake levers --- Last of the true "Dura-Ace" pantographed aero levers... Last D-A levers before STI [08/88]
BR-7400 Brake calipers --- Last single pivot brakes [08/88]
SP-7400 Seatposts --- Last of the 1-piece forged alloy posts (by Nitto) [10/85]
HS-7400 Stems --- Last of the invisible bolt stems (again Nitto) and Last D-A stems ever.[10/85]
HP-7400 Headset --- Last ball bearing headset [09/88]
SL- 7402 d/t shifters --- Last D-A pantographed? (9-speed had Dura-Ace painted on) [11/88]
?
-----------------
?
So, definitely OFF-TOPIC... but, since you asked...
?
........ Whoomp, there it is!
BOB HANSON, ALBUQUERQUE, NEW MEXICO, USA
?
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