SunTour Accushift alpha-2000
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Category:  Rear Derailleurs
Name:  SunTour Accushift alpha-2000
Brand:  SunTour
Model:  RD-2000
Years:  1988 - 1989
Country:  Japan
Weight:  297 grams
Added By: cinco on 11/04/07
Updated By: peterbman on 05/14/18
Additional Photos - click for full size
SunTour Accushift alpha-2000SunTour Accushift alpha-2000
Outer Plate MarkingsSuntour Accushift a-2000Inner Plate MarkingsMaeda Ind. Japan VIA {date code}
MaterialSteelDesign Category
Attachment Bolt Size6mm Allen KeyCable Attachment Bolt Size8mm Wrench
Shifting SystemsSunTour AccuShift
Friction
Cable AdjusterYes
Cage LengthShortMax Cog Size28
Max Chain Wrap  
General Information
Date code EC.

Max cog size is 24T in index mode and 28T in friction mode.(Source Suntour Technical Bulletin #21)
Quality:Rarity:
 
 
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Brand Information(click to expand)

SunTour (Maeda)

SunTour derailleurs have a two-letter date code. On rear derailleurs the code is stamped on the back side of the inner parallel arm. On front derailleurs it is stamped on the back side of the inner cage.

The first letter represents the year. Larry Osborn and I believe O (Oh) is 1972, V is 1979 and A is 1984. As with Shimano, the second letter is the month code, where A is January and L is December.

SunTour Year Code

N
O
P
Q
R
S
T
U
V
W
X
Y
Z
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
 
A
B
C
D
E
F
G
H
I
1984
1985
1986
1987
1988
1989
1990
1991
1992

SunTour Month Code

A
B
C
D
E
F
G
H
I
J
K
L
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

The earliest Suntour derailleur I have found with a code is marked OF. A rear derailleur marked OD (corresponding to April of 72) was reported by Leighton Walter. I have a bike that dates from between 1970 to 1972 that has the original SunTour derailleurs. These derailleurs do not have date codes on them, so I believe the coding started sometime between 1970 and April of 1972.

(source: vintage-trek.com)

 
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